1 /* $NetBSD: nfs_vnops.c,v 1.151 2002/05/19 20:51:04 tls Exp $ */ 2 3 /* 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Rick Macklem at The University of Guelph. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)nfs_vnops.c 8.19 (Berkeley) 7/31/95 39 */ 40 41 /* 42 * vnode op calls for Sun NFS version 2 and 3 43 */ 44 45 #include <sys/cdefs.h> 46 __KERNEL_RCSID(0, "$NetBSD: nfs_vnops.c,v 1.151 2002/05/19 20:51:04 tls Exp $"); 47 48 #include "opt_nfs.h" 49 #include "opt_uvmhist.h" 50 51 #include <sys/param.h> 52 #include <sys/proc.h> 53 #include <sys/kernel.h> 54 #include <sys/systm.h> 55 #include <sys/resourcevar.h> 56 #include <sys/proc.h> 57 #include <sys/mount.h> 58 #include <sys/buf.h> 59 #include <sys/malloc.h> 60 #include <sys/mbuf.h> 61 #include <sys/namei.h> 62 #include <sys/vnode.h> 63 #include <sys/dirent.h> 64 #include <sys/fcntl.h> 65 #include <sys/hash.h> 66 #include <sys/lockf.h> 67 #include <sys/stat.h> 68 #include <sys/unistd.h> 69 70 #include <uvm/uvm_extern.h> 71 #include <uvm/uvm.h> 72 73 #include <miscfs/fifofs/fifo.h> 74 #include <miscfs/genfs/genfs.h> 75 #include <miscfs/specfs/specdev.h> 76 77 #include <nfs/rpcv2.h> 78 #include <nfs/nfsproto.h> 79 #include <nfs/nfs.h> 80 #include <nfs/nfsnode.h> 81 #include <nfs/nfsmount.h> 82 #include <nfs/xdr_subs.h> 83 #include <nfs/nfsm_subs.h> 84 #include <nfs/nqnfs.h> 85 #include <nfs/nfs_var.h> 86 87 #include <net/if.h> 88 #include <netinet/in.h> 89 #include <netinet/in_var.h> 90 91 /* Defs */ 92 #define TRUE 1 93 #define FALSE 0 94 95 /* 96 * Global vfs data structures for nfs 97 */ 98 int (**nfsv2_vnodeop_p) __P((void *)); 99 const struct vnodeopv_entry_desc nfsv2_vnodeop_entries[] = { 100 { &vop_default_desc, vn_default_error }, 101 { &vop_lookup_desc, nfs_lookup }, /* lookup */ 102 { &vop_create_desc, nfs_create }, /* create */ 103 { &vop_mknod_desc, nfs_mknod }, /* mknod */ 104 { &vop_open_desc, nfs_open }, /* open */ 105 { &vop_close_desc, nfs_close }, /* close */ 106 { &vop_access_desc, nfs_access }, /* access */ 107 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 108 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 109 { &vop_read_desc, nfs_read }, /* read */ 110 { &vop_write_desc, nfs_write }, /* write */ 111 { &vop_lease_desc, nfs_lease_check }, /* lease */ 112 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 113 { &vop_ioctl_desc, nfs_ioctl }, /* ioctl */ 114 { &vop_poll_desc, nfs_poll }, /* poll */ 115 { &vop_revoke_desc, nfs_revoke }, /* revoke */ 116 { &vop_mmap_desc, nfs_mmap }, /* mmap */ 117 { &vop_fsync_desc, nfs_fsync }, /* fsync */ 118 { &vop_seek_desc, nfs_seek }, /* seek */ 119 { &vop_remove_desc, nfs_remove }, /* remove */ 120 { &vop_link_desc, nfs_link }, /* link */ 121 { &vop_rename_desc, nfs_rename }, /* rename */ 122 { &vop_mkdir_desc, nfs_mkdir }, /* mkdir */ 123 { &vop_rmdir_desc, nfs_rmdir }, /* rmdir */ 124 { &vop_symlink_desc, nfs_symlink }, /* symlink */ 125 { &vop_readdir_desc, nfs_readdir }, /* readdir */ 126 { &vop_readlink_desc, nfs_readlink }, /* readlink */ 127 { &vop_abortop_desc, nfs_abortop }, /* abortop */ 128 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 129 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 130 { &vop_lock_desc, nfs_lock }, /* lock */ 131 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 132 { &vop_bmap_desc, nfs_bmap }, /* bmap */ 133 { &vop_strategy_desc, nfs_strategy }, /* strategy */ 134 { &vop_print_desc, nfs_print }, /* print */ 135 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 136 { &vop_pathconf_desc, nfs_pathconf }, /* pathconf */ 137 { &vop_advlock_desc, nfs_advlock }, /* advlock */ 138 { &vop_blkatoff_desc, nfs_blkatoff }, /* blkatoff */ 139 { &vop_valloc_desc, nfs_valloc }, /* valloc */ 140 { &vop_reallocblks_desc, nfs_reallocblks }, /* reallocblks */ 141 { &vop_vfree_desc, nfs_vfree }, /* vfree */ 142 { &vop_truncate_desc, nfs_truncate }, /* truncate */ 143 { &vop_update_desc, nfs_update }, /* update */ 144 { &vop_bwrite_desc, nfs_bwrite }, /* bwrite */ 145 { &vop_getpages_desc, nfs_getpages }, /* getpages */ 146 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 147 { NULL, NULL } 148 }; 149 const struct vnodeopv_desc nfsv2_vnodeop_opv_desc = 150 { &nfsv2_vnodeop_p, nfsv2_vnodeop_entries }; 151 152 /* 153 * Special device vnode ops 154 */ 155 int (**spec_nfsv2nodeop_p) __P((void *)); 156 const struct vnodeopv_entry_desc spec_nfsv2nodeop_entries[] = { 157 { &vop_default_desc, vn_default_error }, 158 { &vop_lookup_desc, spec_lookup }, /* lookup */ 159 { &vop_create_desc, spec_create }, /* create */ 160 { &vop_mknod_desc, spec_mknod }, /* mknod */ 161 { &vop_open_desc, spec_open }, /* open */ 162 { &vop_close_desc, nfsspec_close }, /* close */ 163 { &vop_access_desc, nfsspec_access }, /* access */ 164 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 165 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 166 { &vop_read_desc, nfsspec_read }, /* read */ 167 { &vop_write_desc, nfsspec_write }, /* write */ 168 { &vop_lease_desc, spec_lease_check }, /* lease */ 169 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 170 { &vop_ioctl_desc, spec_ioctl }, /* ioctl */ 171 { &vop_poll_desc, spec_poll }, /* poll */ 172 { &vop_revoke_desc, spec_revoke }, /* revoke */ 173 { &vop_mmap_desc, spec_mmap }, /* mmap */ 174 { &vop_fsync_desc, spec_fsync }, /* fsync */ 175 { &vop_seek_desc, spec_seek }, /* seek */ 176 { &vop_remove_desc, spec_remove }, /* remove */ 177 { &vop_link_desc, spec_link }, /* link */ 178 { &vop_rename_desc, spec_rename }, /* rename */ 179 { &vop_mkdir_desc, spec_mkdir }, /* mkdir */ 180 { &vop_rmdir_desc, spec_rmdir }, /* rmdir */ 181 { &vop_symlink_desc, spec_symlink }, /* symlink */ 182 { &vop_readdir_desc, spec_readdir }, /* readdir */ 183 { &vop_readlink_desc, spec_readlink }, /* readlink */ 184 { &vop_abortop_desc, spec_abortop }, /* abortop */ 185 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 186 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 187 { &vop_lock_desc, nfs_lock }, /* lock */ 188 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 189 { &vop_bmap_desc, spec_bmap }, /* bmap */ 190 { &vop_strategy_desc, spec_strategy }, /* strategy */ 191 { &vop_print_desc, nfs_print }, /* print */ 192 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 193 { &vop_pathconf_desc, spec_pathconf }, /* pathconf */ 194 { &vop_advlock_desc, spec_advlock }, /* advlock */ 195 { &vop_blkatoff_desc, spec_blkatoff }, /* blkatoff */ 196 { &vop_valloc_desc, spec_valloc }, /* valloc */ 197 { &vop_reallocblks_desc, spec_reallocblks }, /* reallocblks */ 198 { &vop_vfree_desc, spec_vfree }, /* vfree */ 199 { &vop_truncate_desc, spec_truncate }, /* truncate */ 200 { &vop_update_desc, nfs_update }, /* update */ 201 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 202 { &vop_getpages_desc, spec_getpages }, /* getpages */ 203 { &vop_putpages_desc, spec_putpages }, /* putpages */ 204 { NULL, NULL } 205 }; 206 const struct vnodeopv_desc spec_nfsv2nodeop_opv_desc = 207 { &spec_nfsv2nodeop_p, spec_nfsv2nodeop_entries }; 208 209 int (**fifo_nfsv2nodeop_p) __P((void *)); 210 const struct vnodeopv_entry_desc fifo_nfsv2nodeop_entries[] = { 211 { &vop_default_desc, vn_default_error }, 212 { &vop_lookup_desc, fifo_lookup }, /* lookup */ 213 { &vop_create_desc, fifo_create }, /* create */ 214 { &vop_mknod_desc, fifo_mknod }, /* mknod */ 215 { &vop_open_desc, fifo_open }, /* open */ 216 { &vop_close_desc, nfsfifo_close }, /* close */ 217 { &vop_access_desc, nfsspec_access }, /* access */ 218 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 219 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 220 { &vop_read_desc, nfsfifo_read }, /* read */ 221 { &vop_write_desc, nfsfifo_write }, /* write */ 222 { &vop_lease_desc, fifo_lease_check }, /* lease */ 223 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 224 { &vop_ioctl_desc, fifo_ioctl }, /* ioctl */ 225 { &vop_poll_desc, fifo_poll }, /* poll */ 226 { &vop_revoke_desc, fifo_revoke }, /* revoke */ 227 { &vop_mmap_desc, fifo_mmap }, /* mmap */ 228 { &vop_fsync_desc, nfs_fsync }, /* fsync */ 229 { &vop_seek_desc, fifo_seek }, /* seek */ 230 { &vop_remove_desc, fifo_remove }, /* remove */ 231 { &vop_link_desc, fifo_link }, /* link */ 232 { &vop_rename_desc, fifo_rename }, /* rename */ 233 { &vop_mkdir_desc, fifo_mkdir }, /* mkdir */ 234 { &vop_rmdir_desc, fifo_rmdir }, /* rmdir */ 235 { &vop_symlink_desc, fifo_symlink }, /* symlink */ 236 { &vop_readdir_desc, fifo_readdir }, /* readdir */ 237 { &vop_readlink_desc, fifo_readlink }, /* readlink */ 238 { &vop_abortop_desc, fifo_abortop }, /* abortop */ 239 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 240 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 241 { &vop_lock_desc, nfs_lock }, /* lock */ 242 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 243 { &vop_bmap_desc, fifo_bmap }, /* bmap */ 244 { &vop_strategy_desc, genfs_badop }, /* strategy */ 245 { &vop_print_desc, nfs_print }, /* print */ 246 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 247 { &vop_pathconf_desc, fifo_pathconf }, /* pathconf */ 248 { &vop_advlock_desc, fifo_advlock }, /* advlock */ 249 { &vop_blkatoff_desc, fifo_blkatoff }, /* blkatoff */ 250 { &vop_valloc_desc, fifo_valloc }, /* valloc */ 251 { &vop_reallocblks_desc, fifo_reallocblks }, /* reallocblks */ 252 { &vop_vfree_desc, fifo_vfree }, /* vfree */ 253 { &vop_truncate_desc, fifo_truncate }, /* truncate */ 254 { &vop_update_desc, nfs_update }, /* update */ 255 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 256 { &vop_putpages_desc, fifo_putpages }, /* putpages */ 257 { NULL, NULL } 258 }; 259 const struct vnodeopv_desc fifo_nfsv2nodeop_opv_desc = 260 { &fifo_nfsv2nodeop_p, fifo_nfsv2nodeop_entries }; 261 262 /* 263 * Global variables 264 */ 265 extern u_int32_t nfs_true, nfs_false; 266 extern u_int32_t nfs_xdrneg1; 267 extern nfstype nfsv3_type[9]; 268 269 struct proc *nfs_iodwant[NFS_MAXASYNCDAEMON]; 270 struct nfsmount *nfs_iodmount[NFS_MAXASYNCDAEMON]; 271 int nfs_numasync = 0; 272 #define DIRHDSIZ (sizeof (struct dirent) - (MAXNAMLEN + 1)) 273 274 /* 275 * nfs null call from vfs. 276 */ 277 int 278 nfs_null(vp, cred, procp) 279 struct vnode *vp; 280 struct ucred *cred; 281 struct proc *procp; 282 { 283 caddr_t bpos, dpos; 284 int error = 0; 285 struct mbuf *mreq, *mrep, *md, *mb; 286 287 nfsm_reqhead(vp, NFSPROC_NULL, 0); 288 nfsm_request(vp, NFSPROC_NULL, procp, cred); 289 nfsm_reqdone; 290 return (error); 291 } 292 293 /* 294 * nfs access vnode op. 295 * For nfs version 2, just return ok. File accesses may fail later. 296 * For nfs version 3, use the access rpc to check accessibility. If file modes 297 * are changed on the server, accesses might still fail later. 298 */ 299 int 300 nfs_access(v) 301 void *v; 302 { 303 struct vop_access_args /* { 304 struct vnode *a_vp; 305 int a_mode; 306 struct ucred *a_cred; 307 struct proc *a_p; 308 } */ *ap = v; 309 struct vnode *vp = ap->a_vp; 310 u_int32_t *tl; 311 caddr_t cp; 312 int32_t t1, t2; 313 caddr_t bpos, dpos, cp2; 314 int error = 0, attrflag, cachevalid; 315 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 316 u_int32_t mode, rmode; 317 const int v3 = NFS_ISV3(vp); 318 struct nfsnode *np = VTONFS(vp); 319 320 cachevalid = (np->n_accstamp != -1 && 321 (time.tv_sec - np->n_accstamp) < NFS_ATTRTIMEO(np) && 322 np->n_accuid == ap->a_cred->cr_uid); 323 324 /* 325 * Check access cache first. If this request has been made for this 326 * uid shortly before, use the cached result. 327 */ 328 if (cachevalid) { 329 if (!np->n_accerror) { 330 if ((np->n_accmode & ap->a_mode) == ap->a_mode) 331 return np->n_accerror; 332 } else if ((np->n_accmode & ap->a_mode) == np->n_accmode) 333 return np->n_accerror; 334 } 335 336 /* 337 * For nfs v3, do an access rpc, otherwise you are stuck emulating 338 * ufs_access() locally using the vattr. This may not be correct, 339 * since the server may apply other access criteria such as 340 * client uid-->server uid mapping that we do not know about, but 341 * this is better than just returning anything that is lying about 342 * in the cache. 343 */ 344 if (v3) { 345 nfsstats.rpccnt[NFSPROC_ACCESS]++; 346 nfsm_reqhead(vp, NFSPROC_ACCESS, NFSX_FH(v3) + NFSX_UNSIGNED); 347 nfsm_fhtom(vp, v3); 348 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 349 if (ap->a_mode & VREAD) 350 mode = NFSV3ACCESS_READ; 351 else 352 mode = 0; 353 if (vp->v_type != VDIR) { 354 if (ap->a_mode & VWRITE) 355 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); 356 if (ap->a_mode & VEXEC) 357 mode |= NFSV3ACCESS_EXECUTE; 358 } else { 359 if (ap->a_mode & VWRITE) 360 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | 361 NFSV3ACCESS_DELETE); 362 if (ap->a_mode & VEXEC) 363 mode |= NFSV3ACCESS_LOOKUP; 364 } 365 *tl = txdr_unsigned(mode); 366 nfsm_request(vp, NFSPROC_ACCESS, ap->a_p, ap->a_cred); 367 nfsm_postop_attr(vp, attrflag); 368 if (!error) { 369 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 370 rmode = fxdr_unsigned(u_int32_t, *tl); 371 /* 372 * The NFS V3 spec does not clarify whether or not 373 * the returned access bits can be a superset of 374 * the ones requested, so... 375 */ 376 if ((rmode & mode) != mode) 377 error = EACCES; 378 } 379 nfsm_reqdone; 380 } else 381 return (nfsspec_access(ap)); 382 /* 383 * Disallow write attempts on filesystems mounted read-only; 384 * unless the file is a socket, fifo, or a block or character 385 * device resident on the filesystem. 386 */ 387 if (!error && (ap->a_mode & VWRITE) && 388 (vp->v_mount->mnt_flag & MNT_RDONLY)) { 389 switch (vp->v_type) { 390 case VREG: 391 case VDIR: 392 case VLNK: 393 error = EROFS; 394 default: 395 break; 396 } 397 } 398 399 if (!error || error == EACCES) { 400 /* 401 * If we got the same result as for a previous, 402 * different request, OR it in. Don't update 403 * the timestamp in that case. 404 */ 405 if (cachevalid && np->n_accstamp != -1 && 406 error == np->n_accerror) { 407 if (!error) 408 np->n_accmode |= ap->a_mode; 409 else if ((np->n_accmode & ap->a_mode) == ap->a_mode) 410 np->n_accmode = ap->a_mode; 411 } else { 412 np->n_accstamp = time.tv_sec; 413 np->n_accuid = ap->a_cred->cr_uid; 414 np->n_accmode = ap->a_mode; 415 np->n_accerror = error; 416 } 417 } 418 419 return (error); 420 } 421 422 /* 423 * nfs open vnode op 424 * Check to see if the type is ok 425 * and that deletion is not in progress. 426 * For paged in text files, you will need to flush the page cache 427 * if consistency is lost. 428 */ 429 /* ARGSUSED */ 430 int 431 nfs_open(v) 432 void *v; 433 { 434 struct vop_open_args /* { 435 struct vnode *a_vp; 436 int a_mode; 437 struct ucred *a_cred; 438 struct proc *a_p; 439 } */ *ap = v; 440 struct vnode *vp = ap->a_vp; 441 struct nfsnode *np = VTONFS(vp); 442 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 443 struct vattr vattr; 444 int error; 445 446 if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK) { 447 return (EACCES); 448 } 449 450 /* 451 * Initialize read and write creds here, for swapfiles 452 * and other paths that don't set the creds themselves. 453 */ 454 455 if (ap->a_mode & FREAD) { 456 if (np->n_rcred) { 457 crfree(np->n_rcred); 458 } 459 np->n_rcred = ap->a_cred; 460 crhold(np->n_rcred); 461 } 462 if (ap->a_mode & FWRITE) { 463 if (np->n_wcred) { 464 crfree(np->n_wcred); 465 } 466 np->n_wcred = ap->a_cred; 467 crhold(np->n_wcred); 468 } 469 470 #ifndef NFS_V2_ONLY 471 /* 472 * Get a valid lease. If cached data is stale, flush it. 473 */ 474 if (nmp->nm_flag & NFSMNT_NQNFS) { 475 if (NQNFS_CKINVALID(vp, np, ND_READ)) { 476 do { 477 error = nqnfs_getlease(vp, ND_READ, ap->a_cred, 478 ap->a_p); 479 } while (error == NQNFS_EXPIRED); 480 if (error) 481 return (error); 482 if (np->n_lrev != np->n_brev || 483 (np->n_flag & NQNFSNONCACHE)) { 484 if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 485 ap->a_p, 1)) == EINTR) 486 return (error); 487 np->n_brev = np->n_lrev; 488 } 489 } 490 } else 491 #endif 492 { 493 if (np->n_flag & NMODIFIED) { 494 if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 495 ap->a_p, 1)) == EINTR) 496 return (error); 497 np->n_attrstamp = 0; 498 if (vp->v_type == VDIR) { 499 nfs_invaldircache(vp, 0); 500 np->n_direofoffset = 0; 501 } 502 error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_p); 503 if (error) 504 return (error); 505 np->n_mtime = vattr.va_mtime.tv_sec; 506 } else { 507 error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_p); 508 if (error) 509 return (error); 510 if (np->n_mtime != vattr.va_mtime.tv_sec) { 511 if (vp->v_type == VDIR) { 512 nfs_invaldircache(vp, 0); 513 np->n_direofoffset = 0; 514 } 515 if ((error = nfs_vinvalbuf(vp, V_SAVE, 516 ap->a_cred, ap->a_p, 1)) == EINTR) 517 return (error); 518 np->n_mtime = vattr.va_mtime.tv_sec; 519 } 520 } 521 } 522 if ((nmp->nm_flag & NFSMNT_NQNFS) == 0) 523 np->n_attrstamp = 0; /* For Open/Close consistency */ 524 return (0); 525 } 526 527 /* 528 * nfs close vnode op 529 * What an NFS client should do upon close after writing is a debatable issue. 530 * Most NFS clients push delayed writes to the server upon close, basically for 531 * two reasons: 532 * 1 - So that any write errors may be reported back to the client process 533 * doing the close system call. By far the two most likely errors are 534 * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure. 535 * 2 - To put a worst case upper bound on cache inconsistency between 536 * multiple clients for the file. 537 * There is also a consistency problem for Version 2 of the protocol w.r.t. 538 * not being able to tell if other clients are writing a file concurrently, 539 * since there is no way of knowing if the changed modify time in the reply 540 * is only due to the write for this client. 541 * (NFS Version 3 provides weak cache consistency data in the reply that 542 * should be sufficient to detect and handle this case.) 543 * 544 * The current code does the following: 545 * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers 546 * for NFS Version 3 - flush dirty buffers to the server but don't invalidate 547 * or commit them (this satisfies 1 and 2 except for the 548 * case where the server crashes after this close but 549 * before the commit RPC, which is felt to be "good 550 * enough". Changing the last argument to nfs_flush() to 551 * a 1 would force a commit operation, if it is felt a 552 * commit is necessary now. 553 * for NQNFS - do nothing now, since 2 is dealt with via leases and 554 * 1 should be dealt with via an fsync() system call for 555 * cases where write errors are important. 556 */ 557 /* ARGSUSED */ 558 int 559 nfs_close(v) 560 void *v; 561 { 562 struct vop_close_args /* { 563 struct vnodeop_desc *a_desc; 564 struct vnode *a_vp; 565 int a_fflag; 566 struct ucred *a_cred; 567 struct proc *a_p; 568 } */ *ap = v; 569 struct vnode *vp = ap->a_vp; 570 struct nfsnode *np = VTONFS(vp); 571 int error = 0; 572 UVMHIST_FUNC("nfs_close"); UVMHIST_CALLED(ubchist); 573 574 if (vp->v_type == VREG) { 575 if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) == 0 && 576 (np->n_flag & NMODIFIED)) { 577 if (NFS_ISV3(vp)) { 578 error = nfs_flush(vp, ap->a_cred, MNT_WAIT, ap->a_p, 0); 579 np->n_flag &= ~NMODIFIED; 580 } else 581 error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, ap->a_p, 1); 582 np->n_attrstamp = 0; 583 } 584 if (np->n_flag & NWRITEERR) { 585 np->n_flag &= ~NWRITEERR; 586 error = np->n_error; 587 } 588 } 589 UVMHIST_LOG(ubchist, "returning %d", error,0,0,0); 590 return (error); 591 } 592 593 /* 594 * nfs getattr call from vfs. 595 */ 596 int 597 nfs_getattr(v) 598 void *v; 599 { 600 struct vop_getattr_args /* { 601 struct vnode *a_vp; 602 struct vattr *a_vap; 603 struct ucred *a_cred; 604 struct proc *a_p; 605 } */ *ap = v; 606 struct vnode *vp = ap->a_vp; 607 struct nfsnode *np = VTONFS(vp); 608 caddr_t cp; 609 u_int32_t *tl; 610 int32_t t1, t2; 611 caddr_t bpos, dpos; 612 int error = 0; 613 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 614 const int v3 = NFS_ISV3(vp); 615 616 /* 617 * Update local times for special files. 618 */ 619 if (np->n_flag & (NACC | NUPD)) 620 np->n_flag |= NCHG; 621 /* 622 * First look in the cache. 623 */ 624 if (nfs_getattrcache(vp, ap->a_vap) == 0) 625 return (0); 626 nfsstats.rpccnt[NFSPROC_GETATTR]++; 627 nfsm_reqhead(vp, NFSPROC_GETATTR, NFSX_FH(v3)); 628 nfsm_fhtom(vp, v3); 629 nfsm_request(vp, NFSPROC_GETATTR, ap->a_p, ap->a_cred); 630 if (!error) { 631 nfsm_loadattr(vp, ap->a_vap); 632 if (vp->v_type == VDIR && 633 ap->a_vap->va_blocksize < NFS_DIRFRAGSIZ) 634 ap->a_vap->va_blocksize = NFS_DIRFRAGSIZ; 635 } 636 nfsm_reqdone; 637 return (error); 638 } 639 640 /* 641 * nfs setattr call. 642 */ 643 int 644 nfs_setattr(v) 645 void *v; 646 { 647 struct vop_setattr_args /* { 648 struct vnodeop_desc *a_desc; 649 struct vnode *a_vp; 650 struct vattr *a_vap; 651 struct ucred *a_cred; 652 struct proc *a_p; 653 } */ *ap = v; 654 struct vnode *vp = ap->a_vp; 655 struct nfsnode *np = VTONFS(vp); 656 struct vattr *vap = ap->a_vap; 657 int error = 0; 658 u_quad_t tsize = 0; 659 660 /* 661 * Setting of flags is not supported. 662 */ 663 if (vap->va_flags != VNOVAL) 664 return (EOPNOTSUPP); 665 666 /* 667 * Disallow write attempts if the filesystem is mounted read-only. 668 */ 669 if ((vap->va_uid != (uid_t)VNOVAL || 670 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL || 671 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) && 672 (vp->v_mount->mnt_flag & MNT_RDONLY)) 673 return (EROFS); 674 if (vap->va_size != VNOVAL) { 675 switch (vp->v_type) { 676 case VDIR: 677 return (EISDIR); 678 case VCHR: 679 case VBLK: 680 case VSOCK: 681 case VFIFO: 682 if (vap->va_mtime.tv_sec == VNOVAL && 683 vap->va_atime.tv_sec == VNOVAL && 684 vap->va_mode == (mode_t)VNOVAL && 685 vap->va_uid == (uid_t)VNOVAL && 686 vap->va_gid == (gid_t)VNOVAL) 687 return (0); 688 vap->va_size = VNOVAL; 689 break; 690 default: 691 /* 692 * Disallow write attempts if the filesystem is 693 * mounted read-only. 694 */ 695 if (vp->v_mount->mnt_flag & MNT_RDONLY) 696 return (EROFS); 697 uvm_vnp_setsize(vp, vap->va_size); 698 tsize = np->n_size; 699 np->n_size = vap->va_size; 700 if (vap->va_size == 0) 701 error = nfs_vinvalbuf(vp, 0, 702 ap->a_cred, ap->a_p, 1); 703 else 704 error = nfs_vinvalbuf(vp, V_SAVE, 705 ap->a_cred, ap->a_p, 1); 706 if (error) { 707 uvm_vnp_setsize(vp, tsize); 708 return (error); 709 } 710 np->n_vattr->va_size = vap->va_size; 711 } 712 } else if ((vap->va_mtime.tv_sec != VNOVAL || 713 vap->va_atime.tv_sec != VNOVAL) && 714 vp->v_type == VREG && 715 (error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 716 ap->a_p, 1)) == EINTR) 717 return (error); 718 error = nfs_setattrrpc(vp, vap, ap->a_cred, ap->a_p); 719 if (error && vap->va_size != VNOVAL) { 720 np->n_size = np->n_vattr->va_size = tsize; 721 uvm_vnp_setsize(vp, np->n_size); 722 } 723 return (error); 724 } 725 726 /* 727 * Do an nfs setattr rpc. 728 */ 729 int 730 nfs_setattrrpc(vp, vap, cred, procp) 731 struct vnode *vp; 732 struct vattr *vap; 733 struct ucred *cred; 734 struct proc *procp; 735 { 736 struct nfsv2_sattr *sp; 737 caddr_t cp; 738 int32_t t1, t2; 739 caddr_t bpos, dpos, cp2; 740 u_int32_t *tl; 741 int error = 0, wccflag = NFSV3_WCCRATTR; 742 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 743 const int v3 = NFS_ISV3(vp); 744 745 nfsstats.rpccnt[NFSPROC_SETATTR]++; 746 nfsm_reqhead(vp, NFSPROC_SETATTR, NFSX_FH(v3) + NFSX_SATTR(v3)); 747 nfsm_fhtom(vp, v3); 748 if (v3) { 749 nfsm_v3attrbuild(vap, TRUE); 750 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 751 *tl = nfs_false; 752 } else { 753 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 754 if (vap->va_mode == (mode_t)VNOVAL) 755 sp->sa_mode = nfs_xdrneg1; 756 else 757 sp->sa_mode = vtonfsv2_mode(vp->v_type, vap->va_mode); 758 if (vap->va_uid == (uid_t)VNOVAL) 759 sp->sa_uid = nfs_xdrneg1; 760 else 761 sp->sa_uid = txdr_unsigned(vap->va_uid); 762 if (vap->va_gid == (gid_t)VNOVAL) 763 sp->sa_gid = nfs_xdrneg1; 764 else 765 sp->sa_gid = txdr_unsigned(vap->va_gid); 766 sp->sa_size = txdr_unsigned(vap->va_size); 767 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 768 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 769 } 770 nfsm_request(vp, NFSPROC_SETATTR, procp, cred); 771 if (v3) { 772 nfsm_wcc_data(vp, wccflag); 773 } else 774 nfsm_loadattr(vp, (struct vattr *)0); 775 nfsm_reqdone; 776 return (error); 777 } 778 779 /* 780 * nfs lookup call, one step at a time... 781 * First look in cache 782 * If not found, unlock the directory nfsnode and do the rpc 783 * 784 * This code is full of lock/unlock statements and checks, because 785 * we continue after cache_lookup has finished (we need to check 786 * with the attr cache and do an rpc if it has timed out). This means 787 * that the locking effects of cache_lookup have to be taken into 788 * account. 789 */ 790 int 791 nfs_lookup(v) 792 void *v; 793 { 794 struct vop_lookup_args /* { 795 struct vnodeop_desc *a_desc; 796 struct vnode *a_dvp; 797 struct vnode **a_vpp; 798 struct componentname *a_cnp; 799 } */ *ap = v; 800 struct componentname *cnp = ap->a_cnp; 801 struct vnode *dvp = ap->a_dvp; 802 struct vnode **vpp = ap->a_vpp; 803 int flags; 804 struct vnode *newvp; 805 u_int32_t *tl; 806 caddr_t cp; 807 int32_t t1, t2; 808 struct nfsmount *nmp; 809 caddr_t bpos, dpos, cp2; 810 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 811 long len; 812 nfsfh_t *fhp; 813 struct nfsnode *np; 814 int lockparent, wantparent, error = 0, attrflag, fhsize; 815 const int v3 = NFS_ISV3(dvp); 816 817 cnp->cn_flags &= ~PDIRUNLOCK; 818 flags = cnp->cn_flags; 819 820 *vpp = NULLVP; 821 newvp = NULLVP; 822 if ((flags & ISLASTCN) && (dvp->v_mount->mnt_flag & MNT_RDONLY) && 823 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) 824 return (EROFS); 825 if (dvp->v_type != VDIR) 826 return (ENOTDIR); 827 828 lockparent = flags & LOCKPARENT; 829 wantparent = flags & (LOCKPARENT|WANTPARENT); 830 nmp = VFSTONFS(dvp->v_mount); 831 np = VTONFS(dvp); 832 833 /* 834 * Before tediously performing a linear scan of the directory, 835 * check the name cache to see if the directory/name pair 836 * we are looking for is known already. 837 * If the directory/name pair is found in the name cache, 838 * we have to ensure the directory has not changed from 839 * the time the cache entry has been created. If it has, 840 * the cache entry has to be ignored 841 */ 842 if ((error = cache_lookup(dvp, vpp, cnp)) >= 0) { 843 struct vattr vattr; 844 int err2; 845 846 if (error && error != ENOENT) { 847 *vpp = NULLVP; 848 return error; 849 } 850 851 if (cnp->cn_flags & PDIRUNLOCK) { 852 err2 = vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 853 if (err2 != 0) { 854 *vpp = NULLVP; 855 return err2; 856 } 857 cnp->cn_flags &= ~PDIRUNLOCK; 858 } 859 860 err2 = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, cnp->cn_proc); 861 if (err2 != 0) { 862 if (error == 0) { 863 if (*vpp != dvp) 864 vput(*vpp); 865 else 866 vrele(*vpp); 867 } 868 *vpp = NULLVP; 869 return err2; 870 } 871 872 if (error == ENOENT) { 873 if (!VOP_GETATTR(dvp, &vattr, cnp->cn_cred, 874 cnp->cn_proc) && vattr.va_mtime.tv_sec == 875 VTONFS(dvp)->n_nctime) 876 return ENOENT; 877 cache_purge(dvp); 878 np->n_nctime = 0; 879 goto dorpc; 880 } 881 882 newvp = *vpp; 883 if (!VOP_GETATTR(newvp, &vattr, cnp->cn_cred, cnp->cn_proc) 884 && vattr.va_ctime.tv_sec == VTONFS(newvp)->n_ctime) 885 { 886 nfsstats.lookupcache_hits++; 887 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 888 cnp->cn_flags |= SAVENAME; 889 if ((!lockparent || !(flags & ISLASTCN)) && 890 newvp != dvp) 891 VOP_UNLOCK(dvp, 0); 892 return (0); 893 } 894 cache_purge(newvp); 895 if (newvp != dvp) 896 vput(newvp); 897 else 898 vrele(newvp); 899 *vpp = NULLVP; 900 } 901 dorpc: 902 error = 0; 903 newvp = NULLVP; 904 nfsstats.lookupcache_misses++; 905 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 906 len = cnp->cn_namelen; 907 nfsm_reqhead(dvp, NFSPROC_LOOKUP, 908 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 909 nfsm_fhtom(dvp, v3); 910 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 911 nfsm_request(dvp, NFSPROC_LOOKUP, cnp->cn_proc, cnp->cn_cred); 912 if (error) { 913 nfsm_postop_attr(dvp, attrflag); 914 m_freem(mrep); 915 goto nfsmout; 916 } 917 nfsm_getfh(fhp, fhsize, v3); 918 919 /* 920 * Handle RENAME case... 921 */ 922 if (cnp->cn_nameiop == RENAME && wantparent && (flags & ISLASTCN)) { 923 if (NFS_CMPFH(np, fhp, fhsize)) { 924 m_freem(mrep); 925 return (EISDIR); 926 } 927 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 928 if (error) { 929 m_freem(mrep); 930 return error; 931 } 932 newvp = NFSTOV(np); 933 if (v3) { 934 nfsm_postop_attr(newvp, attrflag); 935 nfsm_postop_attr(dvp, attrflag); 936 } else 937 nfsm_loadattr(newvp, (struct vattr *)0); 938 *vpp = newvp; 939 m_freem(mrep); 940 cnp->cn_flags |= SAVENAME; 941 if (!lockparent) { 942 VOP_UNLOCK(dvp, 0); 943 cnp->cn_flags |= PDIRUNLOCK; 944 } 945 return (0); 946 } 947 948 /* 949 * The postop attr handling is duplicated for each if case, 950 * because it should be done while dvp is locked (unlocking 951 * dvp is different for each case). 952 */ 953 954 if (NFS_CMPFH(np, fhp, fhsize)) { 955 /* 956 * "." lookup 957 */ 958 VREF(dvp); 959 newvp = dvp; 960 if (v3) { 961 nfsm_postop_attr(newvp, attrflag); 962 nfsm_postop_attr(dvp, attrflag); 963 } else 964 nfsm_loadattr(newvp, (struct vattr *)0); 965 } else if (flags & ISDOTDOT) { 966 /* 967 * ".." lookup 968 */ 969 VOP_UNLOCK(dvp, 0); 970 cnp->cn_flags |= PDIRUNLOCK; 971 972 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 973 if (error) { 974 if (vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY) == 0) 975 cnp->cn_flags &= ~PDIRUNLOCK; 976 m_freem(mrep); 977 return error; 978 } 979 newvp = NFSTOV(np); 980 981 if (v3) { 982 nfsm_postop_attr(newvp, attrflag); 983 nfsm_postop_attr(dvp, attrflag); 984 } else 985 nfsm_loadattr(newvp, (struct vattr *)0); 986 987 if (lockparent && (flags & ISLASTCN)) { 988 if ((error = vn_lock(dvp, LK_EXCLUSIVE))) { 989 m_freem(mrep); 990 vput(newvp); 991 return error; 992 } 993 cnp->cn_flags &= ~PDIRUNLOCK; 994 } 995 } else { 996 /* 997 * Other lookups. 998 */ 999 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 1000 if (error) { 1001 m_freem(mrep); 1002 return error; 1003 } 1004 newvp = NFSTOV(np); 1005 if (v3) { 1006 nfsm_postop_attr(newvp, attrflag); 1007 nfsm_postop_attr(dvp, attrflag); 1008 } else 1009 nfsm_loadattr(newvp, (struct vattr *)0); 1010 if (!lockparent || !(flags & ISLASTCN)) { 1011 VOP_UNLOCK(dvp, 0); 1012 cnp->cn_flags |= PDIRUNLOCK; 1013 } 1014 } 1015 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 1016 cnp->cn_flags |= SAVENAME; 1017 if ((cnp->cn_flags & MAKEENTRY) && 1018 (cnp->cn_nameiop != DELETE || !(flags & ISLASTCN))) { 1019 np->n_ctime = np->n_vattr->va_ctime.tv_sec; 1020 cache_enter(dvp, newvp, cnp); 1021 } 1022 *vpp = newvp; 1023 nfsm_reqdone; 1024 if (error) { 1025 /* 1026 * We get here only because of errors returned by 1027 * the RPC. Otherwise we'll have returned above 1028 * (the nfsm_* macros will jump to nfsm_reqdone 1029 * on error). 1030 */ 1031 if (error == ENOENT && (cnp->cn_flags & MAKEENTRY) && 1032 cnp->cn_nameiop != CREATE) { 1033 if (VTONFS(dvp)->n_nctime == 0) 1034 VTONFS(dvp)->n_nctime = 1035 VTONFS(dvp)->n_vattr->va_mtime.tv_sec; 1036 cache_enter(dvp, NULL, cnp); 1037 } 1038 if (newvp != NULLVP) { 1039 vrele(newvp); 1040 if (newvp != dvp) 1041 VOP_UNLOCK(newvp, 0); 1042 } 1043 if ((cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME) && 1044 (flags & ISLASTCN) && error == ENOENT) { 1045 if (dvp->v_mount->mnt_flag & MNT_RDONLY) 1046 error = EROFS; 1047 else 1048 error = EJUSTRETURN; 1049 } 1050 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 1051 cnp->cn_flags |= SAVENAME; 1052 *vpp = NULL; 1053 } 1054 1055 return error; 1056 } 1057 1058 /* 1059 * nfs read call. 1060 * Just call nfs_bioread() to do the work. 1061 */ 1062 int 1063 nfs_read(v) 1064 void *v; 1065 { 1066 struct vop_read_args /* { 1067 struct vnode *a_vp; 1068 struct uio *a_uio; 1069 int a_ioflag; 1070 struct ucred *a_cred; 1071 } */ *ap = v; 1072 struct vnode *vp = ap->a_vp; 1073 1074 if (vp->v_type != VREG) 1075 return (EPERM); 1076 return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag, ap->a_cred, 0)); 1077 } 1078 1079 /* 1080 * nfs readlink call 1081 */ 1082 int 1083 nfs_readlink(v) 1084 void *v; 1085 { 1086 struct vop_readlink_args /* { 1087 struct vnode *a_vp; 1088 struct uio *a_uio; 1089 struct ucred *a_cred; 1090 } */ *ap = v; 1091 struct vnode *vp = ap->a_vp; 1092 1093 if (vp->v_type != VLNK) 1094 return (EPERM); 1095 return (nfs_bioread(vp, ap->a_uio, 0, ap->a_cred, 0)); 1096 } 1097 1098 /* 1099 * Do a readlink rpc. 1100 * Called by nfs_doio() from below the buffer cache. 1101 */ 1102 int 1103 nfs_readlinkrpc(vp, uiop, cred) 1104 struct vnode *vp; 1105 struct uio *uiop; 1106 struct ucred *cred; 1107 { 1108 u_int32_t *tl; 1109 caddr_t cp; 1110 int32_t t1, t2; 1111 caddr_t bpos, dpos, cp2; 1112 int error = 0, len, attrflag; 1113 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1114 const int v3 = NFS_ISV3(vp); 1115 1116 nfsstats.rpccnt[NFSPROC_READLINK]++; 1117 nfsm_reqhead(vp, NFSPROC_READLINK, NFSX_FH(v3)); 1118 nfsm_fhtom(vp, v3); 1119 nfsm_request(vp, NFSPROC_READLINK, uiop->uio_procp, cred); 1120 if (v3) 1121 nfsm_postop_attr(vp, attrflag); 1122 if (!error) { 1123 nfsm_strsiz(len, NFS_MAXPATHLEN); 1124 nfsm_mtouio(uiop, len); 1125 } 1126 nfsm_reqdone; 1127 return (error); 1128 } 1129 1130 /* 1131 * nfs read rpc call 1132 * Ditto above 1133 */ 1134 int 1135 nfs_readrpc(vp, uiop) 1136 struct vnode *vp; 1137 struct uio *uiop; 1138 { 1139 u_int32_t *tl; 1140 caddr_t cp; 1141 int32_t t1, t2; 1142 caddr_t bpos, dpos, cp2; 1143 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1144 struct nfsmount *nmp; 1145 int error = 0, len, retlen, tsiz, eof, attrflag; 1146 const int v3 = NFS_ISV3(vp); 1147 1148 #ifndef nolint 1149 eof = 0; 1150 #endif 1151 nmp = VFSTONFS(vp->v_mount); 1152 tsiz = uiop->uio_resid; 1153 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1154 return (EFBIG); 1155 while (tsiz > 0) { 1156 nfsstats.rpccnt[NFSPROC_READ]++; 1157 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz; 1158 nfsm_reqhead(vp, NFSPROC_READ, NFSX_FH(v3) + NFSX_UNSIGNED * 3); 1159 nfsm_fhtom(vp, v3); 1160 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED * 3); 1161 if (v3) { 1162 txdr_hyper(uiop->uio_offset, tl); 1163 *(tl + 2) = txdr_unsigned(len); 1164 } else { 1165 *tl++ = txdr_unsigned(uiop->uio_offset); 1166 *tl++ = txdr_unsigned(len); 1167 *tl = 0; 1168 } 1169 nfsm_request(vp, NFSPROC_READ, uiop->uio_procp, 1170 VTONFS(vp)->n_rcred); 1171 if (v3) { 1172 nfsm_postop_attr(vp, attrflag); 1173 if (error) { 1174 m_freem(mrep); 1175 goto nfsmout; 1176 } 1177 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1178 eof = fxdr_unsigned(int, *(tl + 1)); 1179 } else 1180 nfsm_loadattr(vp, (struct vattr *)0); 1181 nfsm_strsiz(retlen, nmp->nm_rsize); 1182 nfsm_mtouio(uiop, retlen); 1183 m_freem(mrep); 1184 tsiz -= retlen; 1185 if (v3) { 1186 if (eof || retlen == 0) 1187 tsiz = 0; 1188 } else if (retlen < len) 1189 tsiz = 0; 1190 } 1191 nfsmout: 1192 return (error); 1193 } 1194 1195 /* 1196 * nfs write call 1197 */ 1198 int 1199 nfs_writerpc(vp, uiop, iomode, must_commit) 1200 struct vnode *vp; 1201 struct uio *uiop; 1202 int *iomode, *must_commit; 1203 { 1204 u_int32_t *tl; 1205 caddr_t cp; 1206 int32_t t1, t2, backup; 1207 caddr_t bpos, dpos, cp2; 1208 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1209 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1210 int error = 0, len, tsiz, wccflag = NFSV3_WCCRATTR, rlen, commit; 1211 const int v3 = NFS_ISV3(vp); 1212 int committed = NFSV3WRITE_FILESYNC; 1213 1214 if (vp->v_mount->mnt_flag & MNT_RDONLY) { 1215 panic("writerpc readonly vp %p", vp); 1216 } 1217 1218 #ifdef DIAGNOSTIC 1219 if (uiop->uio_iovcnt != 1) 1220 panic("nfs: writerpc iovcnt > 1"); 1221 #endif 1222 *must_commit = 0; 1223 tsiz = uiop->uio_resid; 1224 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1225 return (EFBIG); 1226 while (tsiz > 0) { 1227 nfsstats.rpccnt[NFSPROC_WRITE]++; 1228 len = min(tsiz, nmp->nm_wsize); 1229 nfsm_reqhead(vp, NFSPROC_WRITE, 1230 NFSX_FH(v3) + 5 * NFSX_UNSIGNED + nfsm_rndup(len)); 1231 nfsm_fhtom(vp, v3); 1232 if (v3) { 1233 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1234 txdr_hyper(uiop->uio_offset, tl); 1235 tl += 2; 1236 *tl++ = txdr_unsigned(len); 1237 *tl++ = txdr_unsigned(*iomode); 1238 *tl = txdr_unsigned(len); 1239 } else { 1240 u_int32_t x; 1241 1242 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1243 /* Set both "begin" and "current" to non-garbage. */ 1244 x = txdr_unsigned((u_int32_t)uiop->uio_offset); 1245 *tl++ = x; /* "begin offset" */ 1246 *tl++ = x; /* "current offset" */ 1247 x = txdr_unsigned(len); 1248 *tl++ = x; /* total to this offset */ 1249 *tl = x; /* size of this write */ 1250 1251 } 1252 nfsm_uiotom(uiop, len); 1253 nfsm_request(vp, NFSPROC_WRITE, uiop->uio_procp, 1254 VTONFS(vp)->n_wcred); 1255 if (v3) { 1256 wccflag = NFSV3_WCCCHK; 1257 nfsm_wcc_data(vp, wccflag); 1258 if (!error) { 1259 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED 1260 + NFSX_V3WRITEVERF); 1261 rlen = fxdr_unsigned(int, *tl++); 1262 if (rlen == 0) { 1263 error = NFSERR_IO; 1264 m_freem(mrep); 1265 break; 1266 } else if (rlen < len) { 1267 backup = len - rlen; 1268 uiop->uio_iov->iov_base = 1269 (caddr_t)uiop->uio_iov->iov_base - 1270 backup; 1271 uiop->uio_iov->iov_len += backup; 1272 uiop->uio_offset -= backup; 1273 uiop->uio_resid += backup; 1274 len = rlen; 1275 } 1276 commit = fxdr_unsigned(int, *tl++); 1277 1278 /* 1279 * Return the lowest committment level 1280 * obtained by any of the RPCs. 1281 */ 1282 if (committed == NFSV3WRITE_FILESYNC) 1283 committed = commit; 1284 else if (committed == NFSV3WRITE_DATASYNC && 1285 commit == NFSV3WRITE_UNSTABLE) 1286 committed = commit; 1287 if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0){ 1288 memcpy((caddr_t)nmp->nm_verf, (caddr_t)tl, 1289 NFSX_V3WRITEVERF); 1290 nmp->nm_iflag |= NFSMNT_HASWRITEVERF; 1291 } else if (memcmp((caddr_t)tl, 1292 (caddr_t)nmp->nm_verf, NFSX_V3WRITEVERF)) { 1293 *must_commit = 1; 1294 memcpy((caddr_t)nmp->nm_verf, (caddr_t)tl, 1295 NFSX_V3WRITEVERF); 1296 } 1297 } 1298 } else 1299 nfsm_loadattr(vp, (struct vattr *)0); 1300 if (wccflag) 1301 VTONFS(vp)->n_mtime = VTONFS(vp)->n_vattr->va_mtime.tv_sec; 1302 m_freem(mrep); 1303 if (error) 1304 break; 1305 tsiz -= len; 1306 } 1307 nfsmout: 1308 *iomode = committed; 1309 if (error) 1310 uiop->uio_resid = tsiz; 1311 return (error); 1312 } 1313 1314 /* 1315 * nfs mknod rpc 1316 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the 1317 * mode set to specify the file type and the size field for rdev. 1318 */ 1319 int 1320 nfs_mknodrpc(dvp, vpp, cnp, vap) 1321 struct vnode *dvp; 1322 struct vnode **vpp; 1323 struct componentname *cnp; 1324 struct vattr *vap; 1325 { 1326 struct nfsv2_sattr *sp; 1327 u_int32_t *tl; 1328 caddr_t cp; 1329 int32_t t1, t2; 1330 struct vnode *newvp = (struct vnode *)0; 1331 struct nfsnode *np; 1332 char *cp2; 1333 caddr_t bpos, dpos; 1334 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0; 1335 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1336 u_int32_t rdev; 1337 const int v3 = NFS_ISV3(dvp); 1338 1339 if (vap->va_type == VCHR || vap->va_type == VBLK) 1340 rdev = txdr_unsigned(vap->va_rdev); 1341 else if (vap->va_type == VFIFO || vap->va_type == VSOCK) 1342 rdev = nfs_xdrneg1; 1343 else { 1344 VOP_ABORTOP(dvp, cnp); 1345 vput(dvp); 1346 return (EOPNOTSUPP); 1347 } 1348 nfsstats.rpccnt[NFSPROC_MKNOD]++; 1349 nfsm_reqhead(dvp, NFSPROC_MKNOD, NFSX_FH(v3) + 4 * NFSX_UNSIGNED + 1350 + nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1351 nfsm_fhtom(dvp, v3); 1352 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1353 if (v3) { 1354 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1355 *tl++ = vtonfsv3_type(vap->va_type); 1356 nfsm_v3attrbuild(vap, FALSE); 1357 if (vap->va_type == VCHR || vap->va_type == VBLK) { 1358 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1359 *tl++ = txdr_unsigned(major(vap->va_rdev)); 1360 *tl = txdr_unsigned(minor(vap->va_rdev)); 1361 } 1362 } else { 1363 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1364 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1365 sp->sa_uid = nfs_xdrneg1; 1366 sp->sa_gid = nfs_xdrneg1; 1367 sp->sa_size = rdev; 1368 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1369 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1370 } 1371 nfsm_request(dvp, NFSPROC_MKNOD, cnp->cn_proc, cnp->cn_cred); 1372 if (!error) { 1373 nfsm_mtofh(dvp, newvp, v3, gotvp); 1374 if (!gotvp) { 1375 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1376 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np); 1377 if (!error) 1378 newvp = NFSTOV(np); 1379 } 1380 } 1381 if (v3) 1382 nfsm_wcc_data(dvp, wccflag); 1383 nfsm_reqdone; 1384 if (error) { 1385 if (newvp) 1386 vput(newvp); 1387 } else { 1388 if (cnp->cn_flags & MAKEENTRY) 1389 cache_enter(dvp, newvp, cnp); 1390 *vpp = newvp; 1391 } 1392 PNBUF_PUT(cnp->cn_pnbuf); 1393 VTONFS(dvp)->n_flag |= NMODIFIED; 1394 if (!wccflag) 1395 VTONFS(dvp)->n_attrstamp = 0; 1396 vput(dvp); 1397 return (error); 1398 } 1399 1400 /* 1401 * nfs mknod vop 1402 * just call nfs_mknodrpc() to do the work. 1403 */ 1404 /* ARGSUSED */ 1405 int 1406 nfs_mknod(v) 1407 void *v; 1408 { 1409 struct vop_mknod_args /* { 1410 struct vnode *a_dvp; 1411 struct vnode **a_vpp; 1412 struct componentname *a_cnp; 1413 struct vattr *a_vap; 1414 } */ *ap = v; 1415 int error; 1416 1417 error = nfs_mknodrpc(ap->a_dvp, ap->a_vpp, ap->a_cnp, ap->a_vap); 1418 return (error); 1419 } 1420 1421 static u_long create_verf; 1422 /* 1423 * nfs file create call 1424 */ 1425 int 1426 nfs_create(v) 1427 void *v; 1428 { 1429 struct vop_create_args /* { 1430 struct vnode *a_dvp; 1431 struct vnode **a_vpp; 1432 struct componentname *a_cnp; 1433 struct vattr *a_vap; 1434 } */ *ap = v; 1435 struct vnode *dvp = ap->a_dvp; 1436 struct vattr *vap = ap->a_vap; 1437 struct componentname *cnp = ap->a_cnp; 1438 struct nfsv2_sattr *sp; 1439 u_int32_t *tl; 1440 caddr_t cp; 1441 int32_t t1, t2; 1442 struct nfsnode *np = (struct nfsnode *)0; 1443 struct vnode *newvp = (struct vnode *)0; 1444 caddr_t bpos, dpos, cp2; 1445 int error, wccflag = NFSV3_WCCRATTR, gotvp = 0, fmode = 0; 1446 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1447 const int v3 = NFS_ISV3(dvp); 1448 1449 /* 1450 * Oops, not for me.. 1451 */ 1452 if (vap->va_type == VSOCK) 1453 return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap)); 1454 1455 #ifdef VA_EXCLUSIVE 1456 if (vap->va_vaflags & VA_EXCLUSIVE) 1457 fmode |= O_EXCL; 1458 #endif 1459 again: 1460 error = 0; 1461 nfsstats.rpccnt[NFSPROC_CREATE]++; 1462 nfsm_reqhead(dvp, NFSPROC_CREATE, NFSX_FH(v3) + 2 * NFSX_UNSIGNED + 1463 nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1464 nfsm_fhtom(dvp, v3); 1465 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1466 if (v3) { 1467 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1468 if (fmode & O_EXCL) { 1469 *tl = txdr_unsigned(NFSV3CREATE_EXCLUSIVE); 1470 nfsm_build(tl, u_int32_t *, NFSX_V3CREATEVERF); 1471 #ifdef INET 1472 if (in_ifaddr.tqh_first) 1473 *tl++ = in_ifaddr.tqh_first->ia_addr.sin_addr.s_addr; 1474 else 1475 *tl++ = create_verf; 1476 #else 1477 *tl++ = create_verf; 1478 #endif 1479 *tl = ++create_verf; 1480 } else { 1481 *tl = txdr_unsigned(NFSV3CREATE_UNCHECKED); 1482 nfsm_v3attrbuild(vap, FALSE); 1483 } 1484 } else { 1485 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1486 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1487 sp->sa_uid = nfs_xdrneg1; 1488 sp->sa_gid = nfs_xdrneg1; 1489 sp->sa_size = 0; 1490 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1491 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1492 } 1493 nfsm_request(dvp, NFSPROC_CREATE, cnp->cn_proc, cnp->cn_cred); 1494 if (!error) { 1495 nfsm_mtofh(dvp, newvp, v3, gotvp); 1496 if (!gotvp) { 1497 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1498 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np); 1499 if (!error) 1500 newvp = NFSTOV(np); 1501 } 1502 } 1503 if (v3) 1504 nfsm_wcc_data(dvp, wccflag); 1505 nfsm_reqdone; 1506 if (error) { 1507 if (v3 && (fmode & O_EXCL) && error == NFSERR_NOTSUPP) { 1508 fmode &= ~O_EXCL; 1509 goto again; 1510 } 1511 if (newvp) 1512 vput(newvp); 1513 } else if (v3 && (fmode & O_EXCL)) 1514 error = nfs_setattrrpc(newvp, vap, cnp->cn_cred, cnp->cn_proc); 1515 if (!error) { 1516 if (cnp->cn_flags & MAKEENTRY) 1517 cache_enter(dvp, newvp, cnp); 1518 *ap->a_vpp = newvp; 1519 } 1520 PNBUF_PUT(cnp->cn_pnbuf); 1521 VTONFS(dvp)->n_flag |= NMODIFIED; 1522 if (!wccflag) 1523 VTONFS(dvp)->n_attrstamp = 0; 1524 vput(dvp); 1525 return (error); 1526 } 1527 1528 /* 1529 * nfs file remove call 1530 * To try and make nfs semantics closer to ufs semantics, a file that has 1531 * other processes using the vnode is renamed instead of removed and then 1532 * removed later on the last close. 1533 * - If v_usecount > 1 1534 * If a rename is not already in the works 1535 * call nfs_sillyrename() to set it up 1536 * else 1537 * do the remove rpc 1538 */ 1539 int 1540 nfs_remove(v) 1541 void *v; 1542 { 1543 struct vop_remove_args /* { 1544 struct vnodeop_desc *a_desc; 1545 struct vnode * a_dvp; 1546 struct vnode * a_vp; 1547 struct componentname * a_cnp; 1548 } */ *ap = v; 1549 struct vnode *vp = ap->a_vp; 1550 struct vnode *dvp = ap->a_dvp; 1551 struct componentname *cnp = ap->a_cnp; 1552 struct nfsnode *np = VTONFS(vp); 1553 int error = 0; 1554 struct vattr vattr; 1555 1556 #ifndef DIAGNOSTIC 1557 if ((cnp->cn_flags & HASBUF) == 0) 1558 panic("nfs_remove: no name"); 1559 if (vp->v_usecount < 1) 1560 panic("nfs_remove: bad v_usecount"); 1561 #endif 1562 if (vp->v_type == VDIR) 1563 error = EPERM; 1564 else if (vp->v_usecount == 1 || (np->n_sillyrename && 1565 VOP_GETATTR(vp, &vattr, cnp->cn_cred, cnp->cn_proc) == 0 && 1566 vattr.va_nlink > 1)) { 1567 /* 1568 * Purge the name cache so that the chance of a lookup for 1569 * the name succeeding while the remove is in progress is 1570 * minimized. Without node locking it can still happen, such 1571 * that an I/O op returns ESTALE, but since you get this if 1572 * another host removes the file.. 1573 */ 1574 cache_purge(vp); 1575 /* 1576 * throw away biocache buffers, mainly to avoid 1577 * unnecessary delayed writes later. 1578 */ 1579 error = nfs_vinvalbuf(vp, 0, cnp->cn_cred, cnp->cn_proc, 1); 1580 /* Do the rpc */ 1581 if (error != EINTR) 1582 error = nfs_removerpc(dvp, cnp->cn_nameptr, 1583 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc); 1584 /* 1585 * Kludge City: If the first reply to the remove rpc is lost.. 1586 * the reply to the retransmitted request will be ENOENT 1587 * since the file was in fact removed 1588 * Therefore, we cheat and return success. 1589 */ 1590 if (error == ENOENT) 1591 error = 0; 1592 } else if (!np->n_sillyrename) 1593 error = nfs_sillyrename(dvp, vp, cnp); 1594 PNBUF_PUT(cnp->cn_pnbuf); 1595 np->n_attrstamp = 0; 1596 vput(dvp); 1597 vput(vp); 1598 return (error); 1599 } 1600 1601 /* 1602 * nfs file remove rpc called from nfs_inactive 1603 */ 1604 int 1605 nfs_removeit(sp) 1606 struct sillyrename *sp; 1607 { 1608 1609 return (nfs_removerpc(sp->s_dvp, sp->s_name, sp->s_namlen, sp->s_cred, 1610 (struct proc *)0)); 1611 } 1612 1613 /* 1614 * Nfs remove rpc, called from nfs_remove() and nfs_removeit(). 1615 */ 1616 int 1617 nfs_removerpc(dvp, name, namelen, cred, proc) 1618 struct vnode *dvp; 1619 const char *name; 1620 int namelen; 1621 struct ucred *cred; 1622 struct proc *proc; 1623 { 1624 u_int32_t *tl; 1625 caddr_t cp; 1626 int32_t t1, t2; 1627 caddr_t bpos, dpos, cp2; 1628 int error = 0, wccflag = NFSV3_WCCRATTR; 1629 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1630 const int v3 = NFS_ISV3(dvp); 1631 1632 nfsstats.rpccnt[NFSPROC_REMOVE]++; 1633 nfsm_reqhead(dvp, NFSPROC_REMOVE, 1634 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(namelen)); 1635 nfsm_fhtom(dvp, v3); 1636 nfsm_strtom(name, namelen, NFS_MAXNAMLEN); 1637 nfsm_request(dvp, NFSPROC_REMOVE, proc, cred); 1638 if (v3) 1639 nfsm_wcc_data(dvp, wccflag); 1640 nfsm_reqdone; 1641 VTONFS(dvp)->n_flag |= NMODIFIED; 1642 if (!wccflag) 1643 VTONFS(dvp)->n_attrstamp = 0; 1644 return (error); 1645 } 1646 1647 /* 1648 * nfs file rename call 1649 */ 1650 int 1651 nfs_rename(v) 1652 void *v; 1653 { 1654 struct vop_rename_args /* { 1655 struct vnode *a_fdvp; 1656 struct vnode *a_fvp; 1657 struct componentname *a_fcnp; 1658 struct vnode *a_tdvp; 1659 struct vnode *a_tvp; 1660 struct componentname *a_tcnp; 1661 } */ *ap = v; 1662 struct vnode *fvp = ap->a_fvp; 1663 struct vnode *tvp = ap->a_tvp; 1664 struct vnode *fdvp = ap->a_fdvp; 1665 struct vnode *tdvp = ap->a_tdvp; 1666 struct componentname *tcnp = ap->a_tcnp; 1667 struct componentname *fcnp = ap->a_fcnp; 1668 int error; 1669 1670 #ifndef DIAGNOSTIC 1671 if ((tcnp->cn_flags & HASBUF) == 0 || 1672 (fcnp->cn_flags & HASBUF) == 0) 1673 panic("nfs_rename: no name"); 1674 #endif 1675 /* Check for cross-device rename */ 1676 if ((fvp->v_mount != tdvp->v_mount) || 1677 (tvp && (fvp->v_mount != tvp->v_mount))) { 1678 error = EXDEV; 1679 goto out; 1680 } 1681 1682 /* 1683 * If the tvp exists and is in use, sillyrename it before doing the 1684 * rename of the new file over it. 1685 */ 1686 if (tvp && tvp->v_usecount > 1 && !VTONFS(tvp)->n_sillyrename && 1687 tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp)) { 1688 vput(tvp); 1689 tvp = NULL; 1690 } 1691 1692 error = nfs_renamerpc(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen, 1693 tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred, 1694 tcnp->cn_proc); 1695 1696 if (fvp->v_type == VDIR) { 1697 if (tvp != NULL && tvp->v_type == VDIR) 1698 cache_purge(tdvp); 1699 cache_purge(fdvp); 1700 } 1701 out: 1702 if (tdvp == tvp) 1703 vrele(tdvp); 1704 else 1705 vput(tdvp); 1706 if (tvp) 1707 vput(tvp); 1708 vrele(fdvp); 1709 vrele(fvp); 1710 /* 1711 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry. 1712 */ 1713 if (error == ENOENT) 1714 error = 0; 1715 return (error); 1716 } 1717 1718 /* 1719 * nfs file rename rpc called from nfs_remove() above 1720 */ 1721 int 1722 nfs_renameit(sdvp, scnp, sp) 1723 struct vnode *sdvp; 1724 struct componentname *scnp; 1725 struct sillyrename *sp; 1726 { 1727 return (nfs_renamerpc(sdvp, scnp->cn_nameptr, scnp->cn_namelen, 1728 sdvp, sp->s_name, sp->s_namlen, scnp->cn_cred, scnp->cn_proc)); 1729 } 1730 1731 /* 1732 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit(). 1733 */ 1734 int 1735 nfs_renamerpc(fdvp, fnameptr, fnamelen, tdvp, tnameptr, tnamelen, cred, proc) 1736 struct vnode *fdvp; 1737 const char *fnameptr; 1738 int fnamelen; 1739 struct vnode *tdvp; 1740 const char *tnameptr; 1741 int tnamelen; 1742 struct ucred *cred; 1743 struct proc *proc; 1744 { 1745 u_int32_t *tl; 1746 caddr_t cp; 1747 int32_t t1, t2; 1748 caddr_t bpos, dpos, cp2; 1749 int error = 0, fwccflag = NFSV3_WCCRATTR, twccflag = NFSV3_WCCRATTR; 1750 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1751 const int v3 = NFS_ISV3(fdvp); 1752 1753 nfsstats.rpccnt[NFSPROC_RENAME]++; 1754 nfsm_reqhead(fdvp, NFSPROC_RENAME, 1755 (NFSX_FH(v3) + NFSX_UNSIGNED)*2 + nfsm_rndup(fnamelen) + 1756 nfsm_rndup(tnamelen)); 1757 nfsm_fhtom(fdvp, v3); 1758 nfsm_strtom(fnameptr, fnamelen, NFS_MAXNAMLEN); 1759 nfsm_fhtom(tdvp, v3); 1760 nfsm_strtom(tnameptr, tnamelen, NFS_MAXNAMLEN); 1761 nfsm_request(fdvp, NFSPROC_RENAME, proc, cred); 1762 if (v3) { 1763 nfsm_wcc_data(fdvp, fwccflag); 1764 nfsm_wcc_data(tdvp, twccflag); 1765 } 1766 nfsm_reqdone; 1767 VTONFS(fdvp)->n_flag |= NMODIFIED; 1768 VTONFS(tdvp)->n_flag |= NMODIFIED; 1769 if (!fwccflag) 1770 VTONFS(fdvp)->n_attrstamp = 0; 1771 if (!twccflag) 1772 VTONFS(tdvp)->n_attrstamp = 0; 1773 return (error); 1774 } 1775 1776 /* 1777 * nfs hard link create call 1778 */ 1779 int 1780 nfs_link(v) 1781 void *v; 1782 { 1783 struct vop_link_args /* { 1784 struct vnode *a_dvp; 1785 struct vnode *a_vp; 1786 struct componentname *a_cnp; 1787 } */ *ap = v; 1788 struct vnode *vp = ap->a_vp; 1789 struct vnode *dvp = ap->a_dvp; 1790 struct componentname *cnp = ap->a_cnp; 1791 u_int32_t *tl; 1792 caddr_t cp; 1793 int32_t t1, t2; 1794 caddr_t bpos, dpos, cp2; 1795 int error = 0, wccflag = NFSV3_WCCRATTR, attrflag = 0; 1796 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1797 /* XXX Should be const and initialised? */ 1798 int v3; 1799 1800 if (dvp->v_mount != vp->v_mount) { 1801 VOP_ABORTOP(dvp, cnp); 1802 vput(dvp); 1803 return (EXDEV); 1804 } 1805 if (dvp != vp) { 1806 error = vn_lock(vp, LK_EXCLUSIVE); 1807 if (error != 0) { 1808 VOP_ABORTOP(dvp, cnp); 1809 vput(dvp); 1810 return error; 1811 } 1812 } 1813 1814 /* 1815 * Push all writes to the server, so that the attribute cache 1816 * doesn't get "out of sync" with the server. 1817 * XXX There should be a better way! 1818 */ 1819 VOP_FSYNC(vp, cnp->cn_cred, FSYNC_WAIT, 0, 0, cnp->cn_proc); 1820 1821 v3 = NFS_ISV3(vp); 1822 nfsstats.rpccnt[NFSPROC_LINK]++; 1823 nfsm_reqhead(vp, NFSPROC_LINK, 1824 NFSX_FH(v3)*2 + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 1825 nfsm_fhtom(vp, v3); 1826 nfsm_fhtom(dvp, v3); 1827 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1828 nfsm_request(vp, NFSPROC_LINK, cnp->cn_proc, cnp->cn_cred); 1829 if (v3) { 1830 nfsm_postop_attr(vp, attrflag); 1831 nfsm_wcc_data(dvp, wccflag); 1832 } 1833 nfsm_reqdone; 1834 PNBUF_PUT(cnp->cn_pnbuf); 1835 VTONFS(dvp)->n_flag |= NMODIFIED; 1836 if (!attrflag) 1837 VTONFS(vp)->n_attrstamp = 0; 1838 if (!wccflag) 1839 VTONFS(dvp)->n_attrstamp = 0; 1840 if (dvp != vp) 1841 VOP_UNLOCK(vp, 0); 1842 vput(dvp); 1843 /* 1844 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 1845 */ 1846 if (error == EEXIST) 1847 error = 0; 1848 return (error); 1849 } 1850 1851 /* 1852 * nfs symbolic link create call 1853 */ 1854 int 1855 nfs_symlink(v) 1856 void *v; 1857 { 1858 struct vop_symlink_args /* { 1859 struct vnode *a_dvp; 1860 struct vnode **a_vpp; 1861 struct componentname *a_cnp; 1862 struct vattr *a_vap; 1863 char *a_target; 1864 } */ *ap = v; 1865 struct vnode *dvp = ap->a_dvp; 1866 struct vattr *vap = ap->a_vap; 1867 struct componentname *cnp = ap->a_cnp; 1868 struct nfsv2_sattr *sp; 1869 u_int32_t *tl; 1870 caddr_t cp; 1871 int32_t t1, t2; 1872 caddr_t bpos, dpos, cp2; 1873 int slen, error = 0, wccflag = NFSV3_WCCRATTR, gotvp; 1874 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1875 struct vnode *newvp = (struct vnode *)0; 1876 const int v3 = NFS_ISV3(dvp); 1877 1878 *ap->a_vpp = NULL; 1879 nfsstats.rpccnt[NFSPROC_SYMLINK]++; 1880 slen = strlen(ap->a_target); 1881 nfsm_reqhead(dvp, NFSPROC_SYMLINK, NFSX_FH(v3) + 2*NFSX_UNSIGNED + 1882 nfsm_rndup(cnp->cn_namelen) + nfsm_rndup(slen) + NFSX_SATTR(v3)); 1883 nfsm_fhtom(dvp, v3); 1884 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1885 if (v3) 1886 nfsm_v3attrbuild(vap, FALSE); 1887 nfsm_strtom(ap->a_target, slen, NFS_MAXPATHLEN); 1888 if (!v3) { 1889 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1890 sp->sa_mode = vtonfsv2_mode(VLNK, vap->va_mode); 1891 sp->sa_uid = nfs_xdrneg1; 1892 sp->sa_gid = nfs_xdrneg1; 1893 sp->sa_size = nfs_xdrneg1; 1894 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1895 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1896 } 1897 nfsm_request(dvp, NFSPROC_SYMLINK, cnp->cn_proc, cnp->cn_cred); 1898 if (v3) { 1899 if (!error) 1900 nfsm_mtofh(dvp, newvp, v3, gotvp); 1901 nfsm_wcc_data(dvp, wccflag); 1902 } 1903 nfsm_reqdone; 1904 /* 1905 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 1906 */ 1907 if (error == EEXIST) 1908 error = 0; 1909 if (error == 0 && newvp == NULL) { 1910 struct nfsnode *np = NULL; 1911 1912 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen, 1913 cnp->cn_cred, cnp->cn_proc, &np); 1914 if (error == 0) 1915 newvp = NFSTOV(np); 1916 } 1917 if (error) { 1918 if (newvp != NULL) 1919 vput(newvp); 1920 } else { 1921 *ap->a_vpp = newvp; 1922 } 1923 PNBUF_PUT(cnp->cn_pnbuf); 1924 VTONFS(dvp)->n_flag |= NMODIFIED; 1925 if (!wccflag) 1926 VTONFS(dvp)->n_attrstamp = 0; 1927 vput(dvp); 1928 return (error); 1929 } 1930 1931 /* 1932 * nfs make dir call 1933 */ 1934 int 1935 nfs_mkdir(v) 1936 void *v; 1937 { 1938 struct vop_mkdir_args /* { 1939 struct vnode *a_dvp; 1940 struct vnode **a_vpp; 1941 struct componentname *a_cnp; 1942 struct vattr *a_vap; 1943 } */ *ap = v; 1944 struct vnode *dvp = ap->a_dvp; 1945 struct vattr *vap = ap->a_vap; 1946 struct componentname *cnp = ap->a_cnp; 1947 struct nfsv2_sattr *sp; 1948 u_int32_t *tl; 1949 caddr_t cp; 1950 int32_t t1, t2; 1951 int len; 1952 struct nfsnode *np = (struct nfsnode *)0; 1953 struct vnode *newvp = (struct vnode *)0; 1954 caddr_t bpos, dpos, cp2; 1955 int error = 0, wccflag = NFSV3_WCCRATTR; 1956 int gotvp = 0; 1957 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1958 const int v3 = NFS_ISV3(dvp); 1959 1960 len = cnp->cn_namelen; 1961 nfsstats.rpccnt[NFSPROC_MKDIR]++; 1962 nfsm_reqhead(dvp, NFSPROC_MKDIR, 1963 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len) + NFSX_SATTR(v3)); 1964 nfsm_fhtom(dvp, v3); 1965 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 1966 if (v3) { 1967 nfsm_v3attrbuild(vap, FALSE); 1968 } else { 1969 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1970 sp->sa_mode = vtonfsv2_mode(VDIR, vap->va_mode); 1971 sp->sa_uid = nfs_xdrneg1; 1972 sp->sa_gid = nfs_xdrneg1; 1973 sp->sa_size = nfs_xdrneg1; 1974 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1975 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1976 } 1977 nfsm_request(dvp, NFSPROC_MKDIR, cnp->cn_proc, cnp->cn_cred); 1978 if (!error) 1979 nfsm_mtofh(dvp, newvp, v3, gotvp); 1980 if (v3) 1981 nfsm_wcc_data(dvp, wccflag); 1982 nfsm_reqdone; 1983 VTONFS(dvp)->n_flag |= NMODIFIED; 1984 if (!wccflag) 1985 VTONFS(dvp)->n_attrstamp = 0; 1986 /* 1987 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry 1988 * if we can succeed in looking up the directory. 1989 */ 1990 if (error == EEXIST || (!error && !gotvp)) { 1991 if (newvp) { 1992 vput(newvp); 1993 newvp = (struct vnode *)0; 1994 } 1995 error = nfs_lookitup(dvp, cnp->cn_nameptr, len, cnp->cn_cred, 1996 cnp->cn_proc, &np); 1997 if (!error) { 1998 newvp = NFSTOV(np); 1999 if (newvp->v_type != VDIR) 2000 error = EEXIST; 2001 } 2002 } 2003 if (error) { 2004 if (newvp) 2005 vput(newvp); 2006 } else { 2007 if (cnp->cn_flags & MAKEENTRY) 2008 cache_enter(dvp, newvp, cnp); 2009 *ap->a_vpp = newvp; 2010 } 2011 PNBUF_PUT(cnp->cn_pnbuf); 2012 vput(dvp); 2013 return (error); 2014 } 2015 2016 /* 2017 * nfs remove directory call 2018 */ 2019 int 2020 nfs_rmdir(v) 2021 void *v; 2022 { 2023 struct vop_rmdir_args /* { 2024 struct vnode *a_dvp; 2025 struct vnode *a_vp; 2026 struct componentname *a_cnp; 2027 } */ *ap = v; 2028 struct vnode *vp = ap->a_vp; 2029 struct vnode *dvp = ap->a_dvp; 2030 struct componentname *cnp = ap->a_cnp; 2031 u_int32_t *tl; 2032 caddr_t cp; 2033 int32_t t1, t2; 2034 caddr_t bpos, dpos, cp2; 2035 int error = 0, wccflag = NFSV3_WCCRATTR; 2036 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2037 const int v3 = NFS_ISV3(dvp); 2038 2039 if (dvp == vp) { 2040 vrele(dvp); 2041 vput(dvp); 2042 PNBUF_PUT(cnp->cn_pnbuf); 2043 return (EINVAL); 2044 } 2045 nfsstats.rpccnt[NFSPROC_RMDIR]++; 2046 nfsm_reqhead(dvp, NFSPROC_RMDIR, 2047 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 2048 nfsm_fhtom(dvp, v3); 2049 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 2050 nfsm_request(dvp, NFSPROC_RMDIR, cnp->cn_proc, cnp->cn_cred); 2051 if (v3) 2052 nfsm_wcc_data(dvp, wccflag); 2053 nfsm_reqdone; 2054 PNBUF_PUT(cnp->cn_pnbuf); 2055 VTONFS(dvp)->n_flag |= NMODIFIED; 2056 if (!wccflag) 2057 VTONFS(dvp)->n_attrstamp = 0; 2058 cache_purge(dvp); 2059 cache_purge(vp); 2060 vput(vp); 2061 vput(dvp); 2062 /* 2063 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry. 2064 */ 2065 if (error == ENOENT) 2066 error = 0; 2067 return (error); 2068 } 2069 2070 /* 2071 * nfs readdir call 2072 */ 2073 int 2074 nfs_readdir(v) 2075 void *v; 2076 { 2077 struct vop_readdir_args /* { 2078 struct vnode *a_vp; 2079 struct uio *a_uio; 2080 struct ucred *a_cred; 2081 int *a_eofflag; 2082 off_t **a_cookies; 2083 int *a_ncookies; 2084 } */ *ap = v; 2085 struct vnode *vp = ap->a_vp; 2086 struct uio *uio = ap->a_uio; 2087 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2088 char *base = uio->uio_iov->iov_base; 2089 int tresid, error; 2090 size_t count, lost; 2091 struct dirent *dp; 2092 off_t *cookies = NULL; 2093 int ncookies = 0, nc; 2094 2095 if (vp->v_type != VDIR) 2096 return (EPERM); 2097 2098 lost = uio->uio_resid & (NFS_DIRFRAGSIZ - 1); 2099 count = uio->uio_resid - lost; 2100 if (count <= 0) 2101 return (EINVAL); 2102 2103 /* 2104 * Call nfs_bioread() to do the real work. 2105 */ 2106 tresid = uio->uio_resid = count; 2107 error = nfs_bioread(vp, uio, 0, ap->a_cred, 2108 ap->a_cookies ? NFSBIO_CACHECOOKIES : 0); 2109 2110 if (!error && ap->a_cookies) { 2111 ncookies = count / 16; 2112 cookies = malloc(sizeof (off_t) * ncookies, M_TEMP, M_WAITOK); 2113 *ap->a_cookies = cookies; 2114 } 2115 2116 if (!error && uio->uio_resid == tresid) { 2117 uio->uio_resid += lost; 2118 nfsstats.direofcache_misses++; 2119 if (ap->a_cookies) 2120 *ap->a_ncookies = 0; 2121 *ap->a_eofflag = 1; 2122 return (0); 2123 } 2124 2125 if (!error && ap->a_cookies) { 2126 /* 2127 * Only the NFS server and emulations use cookies, and they 2128 * load the directory block into system space, so we can 2129 * just look at it directly. 2130 */ 2131 if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) 2132 panic("nfs_readdir: lost in space"); 2133 for (nc = 0; ncookies-- && 2134 base < (char *)uio->uio_iov->iov_base; nc++){ 2135 dp = (struct dirent *) base; 2136 if (dp->d_reclen == 0) 2137 break; 2138 if (nmp->nm_flag & NFSMNT_XLATECOOKIE) 2139 *(cookies++) = (off_t)NFS_GETCOOKIE32(dp); 2140 else 2141 *(cookies++) = NFS_GETCOOKIE(dp); 2142 base += dp->d_reclen; 2143 } 2144 uio->uio_resid += 2145 ((caddr_t)uio->uio_iov->iov_base - base); 2146 uio->uio_iov->iov_len += 2147 ((caddr_t)uio->uio_iov->iov_base - base); 2148 uio->uio_iov->iov_base = base; 2149 *ap->a_ncookies = nc; 2150 } 2151 2152 uio->uio_resid += lost; 2153 *ap->a_eofflag = 0; 2154 return (error); 2155 } 2156 2157 /* 2158 * Readdir rpc call. 2159 * Called from below the buffer cache by nfs_doio(). 2160 */ 2161 int 2162 nfs_readdirrpc(vp, uiop, cred) 2163 struct vnode *vp; 2164 struct uio *uiop; 2165 struct ucred *cred; 2166 { 2167 int len, left; 2168 struct dirent *dp = NULL; 2169 u_int32_t *tl; 2170 caddr_t cp; 2171 int32_t t1, t2; 2172 caddr_t bpos, dpos, cp2; 2173 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2174 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2175 struct nfsnode *dnp = VTONFS(vp); 2176 u_quad_t fileno; 2177 int error = 0, tlen, more_dirs = 1, blksiz = 0, bigenough = 1; 2178 int attrflag, nrpcs = 0, reclen; 2179 const int v3 = NFS_ISV3(vp); 2180 2181 #ifdef DIAGNOSTIC 2182 /* 2183 * Should be called from buffer cache, so only amount of 2184 * NFS_DIRBLKSIZ will be requested. 2185 */ 2186 if (uiop->uio_iovcnt != 1 || (uiop->uio_resid & (NFS_DIRBLKSIZ - 1))) 2187 panic("nfs readdirrpc bad uio"); 2188 #endif 2189 2190 /* 2191 * Loop around doing readdir rpc's of size nm_readdirsize 2192 * truncated to a multiple of NFS_DIRFRAGSIZ. 2193 * The stopping criteria is EOF or buffer full. 2194 */ 2195 while (more_dirs && bigenough) { 2196 /* 2197 * Heuristic: don't bother to do another RPC to further 2198 * fill up this block if there is not much room left. (< 50% 2199 * of the readdir RPC size). This wastes some buffer space 2200 * but can save up to 50% in RPC calls. 2201 */ 2202 if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { 2203 bigenough = 0; 2204 break; 2205 } 2206 nfsstats.rpccnt[NFSPROC_READDIR]++; 2207 nfsm_reqhead(vp, NFSPROC_READDIR, NFSX_FH(v3) + 2208 NFSX_READDIR(v3)); 2209 nfsm_fhtom(vp, v3); 2210 if (v3) { 2211 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 2212 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { 2213 txdr_swapcookie3(uiop->uio_offset, tl); 2214 } else { 2215 txdr_cookie3(uiop->uio_offset, tl); 2216 } 2217 tl += 2; 2218 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2219 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2220 } else { 2221 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2222 *tl++ = txdr_unsigned(uiop->uio_offset); 2223 } 2224 *tl = txdr_unsigned(nmp->nm_readdirsize); 2225 nfsm_request(vp, NFSPROC_READDIR, uiop->uio_procp, cred); 2226 nrpcs++; 2227 if (v3) { 2228 nfsm_postop_attr(vp, attrflag); 2229 if (!error) { 2230 nfsm_dissect(tl, u_int32_t *, 2231 2 * NFSX_UNSIGNED); 2232 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2233 dnp->n_cookieverf.nfsuquad[1] = *tl; 2234 } else { 2235 m_freem(mrep); 2236 goto nfsmout; 2237 } 2238 } 2239 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2240 more_dirs = fxdr_unsigned(int, *tl); 2241 2242 /* loop thru the dir entries, doctoring them to 4bsd form */ 2243 while (more_dirs && bigenough) { 2244 if (v3) { 2245 nfsm_dissect(tl, u_int32_t *, 2246 3 * NFSX_UNSIGNED); 2247 fileno = fxdr_hyper(tl); 2248 len = fxdr_unsigned(int, *(tl + 2)); 2249 } else { 2250 nfsm_dissect(tl, u_int32_t *, 2251 2 * NFSX_UNSIGNED); 2252 fileno = fxdr_unsigned(u_quad_t, *tl++); 2253 len = fxdr_unsigned(int, *tl); 2254 } 2255 if (len <= 0 || len > NFS_MAXNAMLEN) { 2256 error = EBADRPC; 2257 m_freem(mrep); 2258 goto nfsmout; 2259 } 2260 tlen = nfsm_rndup(len); 2261 if (tlen == len) 2262 tlen += 4; /* To ensure null termination */ 2263 tlen += sizeof (off_t) + sizeof (int); 2264 reclen = ALIGN(tlen + DIRHDSIZ); 2265 tlen = reclen - DIRHDSIZ; 2266 left = NFS_DIRFRAGSIZ - blksiz; 2267 if (reclen > left) { 2268 dp->d_reclen += left; 2269 uiop->uio_iov->iov_base = 2270 (caddr_t)uiop->uio_iov->iov_base + left; 2271 uiop->uio_iov->iov_len -= left; 2272 uiop->uio_resid -= left; 2273 blksiz = 0; 2274 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2275 } 2276 if (reclen > uiop->uio_resid) 2277 bigenough = 0; 2278 if (bigenough) { 2279 dp = (struct dirent *)uiop->uio_iov->iov_base; 2280 dp->d_fileno = (int)fileno; 2281 dp->d_namlen = len; 2282 dp->d_reclen = reclen; 2283 dp->d_type = DT_UNKNOWN; 2284 blksiz += dp->d_reclen; 2285 if (blksiz == NFS_DIRFRAGSIZ) 2286 blksiz = 0; 2287 uiop->uio_resid -= DIRHDSIZ; 2288 uiop->uio_iov->iov_base = 2289 (caddr_t)uiop->uio_iov->iov_base + DIRHDSIZ; 2290 uiop->uio_iov->iov_len -= DIRHDSIZ; 2291 nfsm_mtouio(uiop, len); 2292 cp = uiop->uio_iov->iov_base; 2293 tlen -= len; 2294 *cp = '\0'; /* null terminate */ 2295 uiop->uio_iov->iov_base = 2296 (caddr_t)uiop->uio_iov->iov_base + tlen; 2297 uiop->uio_iov->iov_len -= tlen; 2298 uiop->uio_resid -= tlen; 2299 } else 2300 nfsm_adv(nfsm_rndup(len)); 2301 if (v3) { 2302 nfsm_dissect(tl, u_int32_t *, 2303 3 * NFSX_UNSIGNED); 2304 } else { 2305 nfsm_dissect(tl, u_int32_t *, 2306 2 * NFSX_UNSIGNED); 2307 } 2308 if (bigenough) { 2309 if (v3) { 2310 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) 2311 uiop->uio_offset = 2312 fxdr_swapcookie3(tl); 2313 else 2314 uiop->uio_offset = 2315 fxdr_cookie3(tl); 2316 } 2317 else { 2318 uiop->uio_offset = 2319 fxdr_unsigned(off_t, *tl); 2320 } 2321 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2322 } 2323 if (v3) 2324 tl += 2; 2325 else 2326 tl++; 2327 more_dirs = fxdr_unsigned(int, *tl); 2328 } 2329 /* 2330 * If at end of rpc data, get the eof boolean 2331 */ 2332 if (!more_dirs) { 2333 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2334 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2335 } 2336 m_freem(mrep); 2337 } 2338 /* 2339 * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ 2340 * by increasing d_reclen for the last record. 2341 */ 2342 if (blksiz > 0) { 2343 left = NFS_DIRFRAGSIZ - blksiz; 2344 dp->d_reclen += left; 2345 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2346 uiop->uio_iov->iov_base = (caddr_t)uiop->uio_iov->iov_base + 2347 left; 2348 uiop->uio_iov->iov_len -= left; 2349 uiop->uio_resid -= left; 2350 } 2351 2352 /* 2353 * We are now either at the end of the directory or have filled the 2354 * block. 2355 */ 2356 if (bigenough) 2357 dnp->n_direofoffset = uiop->uio_offset; 2358 nfsmout: 2359 return (error); 2360 } 2361 2362 /* 2363 * NFS V3 readdir plus RPC. Used in place of nfs_readdirrpc(). 2364 */ 2365 int 2366 nfs_readdirplusrpc(vp, uiop, cred) 2367 struct vnode *vp; 2368 struct uio *uiop; 2369 struct ucred *cred; 2370 { 2371 int len, left; 2372 struct dirent *dp = NULL; 2373 u_int32_t *tl; 2374 caddr_t cp; 2375 int32_t t1, t2; 2376 struct vnode *newvp; 2377 caddr_t bpos, dpos, cp2; 2378 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2379 struct nameidata nami, *ndp = &nami; 2380 struct componentname *cnp = &ndp->ni_cnd; 2381 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2382 struct nfsnode *dnp = VTONFS(vp), *np; 2383 nfsfh_t *fhp; 2384 u_quad_t fileno; 2385 int error = 0, tlen, more_dirs = 1, blksiz = 0, doit, bigenough = 1, i; 2386 int attrflag, fhsize, nrpcs = 0, reclen; 2387 struct nfs_fattr fattr, *fp; 2388 2389 #ifdef DIAGNOSTIC 2390 if (uiop->uio_iovcnt != 1 || (uiop->uio_resid & (NFS_DIRBLKSIZ - 1))) 2391 panic("nfs readdirplusrpc bad uio"); 2392 #endif 2393 ndp->ni_dvp = vp; 2394 newvp = NULLVP; 2395 2396 /* 2397 * Loop around doing readdir rpc's of size nm_readdirsize 2398 * truncated to a multiple of NFS_DIRFRAGSIZ. 2399 * The stopping criteria is EOF or buffer full. 2400 */ 2401 while (more_dirs && bigenough) { 2402 if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { 2403 bigenough = 0; 2404 break; 2405 } 2406 nfsstats.rpccnt[NFSPROC_READDIRPLUS]++; 2407 nfsm_reqhead(vp, NFSPROC_READDIRPLUS, 2408 NFSX_FH(1) + 6 * NFSX_UNSIGNED); 2409 nfsm_fhtom(vp, 1); 2410 nfsm_build(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2411 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { 2412 txdr_swapcookie3(uiop->uio_offset, tl); 2413 } else { 2414 txdr_cookie3(uiop->uio_offset, tl); 2415 } 2416 tl += 2; 2417 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2418 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2419 *tl++ = txdr_unsigned(nmp->nm_readdirsize); 2420 *tl = txdr_unsigned(nmp->nm_rsize); 2421 nfsm_request(vp, NFSPROC_READDIRPLUS, uiop->uio_procp, cred); 2422 nfsm_postop_attr(vp, attrflag); 2423 if (error) { 2424 m_freem(mrep); 2425 goto nfsmout; 2426 } 2427 nrpcs++; 2428 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2429 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2430 dnp->n_cookieverf.nfsuquad[1] = *tl++; 2431 more_dirs = fxdr_unsigned(int, *tl); 2432 2433 /* loop thru the dir entries, doctoring them to 4bsd form */ 2434 while (more_dirs && bigenough) { 2435 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2436 fileno = fxdr_hyper(tl); 2437 len = fxdr_unsigned(int, *(tl + 2)); 2438 if (len <= 0 || len > NFS_MAXNAMLEN) { 2439 error = EBADRPC; 2440 m_freem(mrep); 2441 goto nfsmout; 2442 } 2443 tlen = nfsm_rndup(len); 2444 if (tlen == len) 2445 tlen += 4; /* To ensure null termination*/ 2446 tlen += sizeof (off_t) + sizeof (int); 2447 reclen = ALIGN(tlen + DIRHDSIZ); 2448 tlen = reclen - DIRHDSIZ; 2449 left = NFS_DIRFRAGSIZ - blksiz; 2450 if (reclen > left) { 2451 /* 2452 * DIRFRAGSIZ is aligned, no need to align 2453 * again here. 2454 */ 2455 dp->d_reclen += left; 2456 uiop->uio_iov->iov_base = 2457 (caddr_t)uiop->uio_iov->iov_base + left; 2458 uiop->uio_iov->iov_len -= left; 2459 uiop->uio_resid -= left; 2460 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2461 blksiz = 0; 2462 } 2463 if (reclen > uiop->uio_resid) 2464 bigenough = 0; 2465 if (bigenough) { 2466 dp = (struct dirent *)uiop->uio_iov->iov_base; 2467 dp->d_fileno = (int)fileno; 2468 dp->d_namlen = len; 2469 dp->d_reclen = reclen; 2470 dp->d_type = DT_UNKNOWN; 2471 blksiz += dp->d_reclen; 2472 if (blksiz == NFS_DIRFRAGSIZ) 2473 blksiz = 0; 2474 uiop->uio_resid -= DIRHDSIZ; 2475 uiop->uio_iov->iov_base = 2476 (caddr_t)uiop->uio_iov->iov_base + 2477 DIRHDSIZ; 2478 uiop->uio_iov->iov_len -= DIRHDSIZ; 2479 cnp->cn_nameptr = uiop->uio_iov->iov_base; 2480 cnp->cn_namelen = len; 2481 nfsm_mtouio(uiop, len); 2482 cp = uiop->uio_iov->iov_base; 2483 tlen -= len; 2484 *cp = '\0'; 2485 uiop->uio_iov->iov_base = 2486 (caddr_t)uiop->uio_iov->iov_base + tlen; 2487 uiop->uio_iov->iov_len -= tlen; 2488 uiop->uio_resid -= tlen; 2489 } else 2490 nfsm_adv(nfsm_rndup(len)); 2491 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2492 if (bigenough) { 2493 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) 2494 uiop->uio_offset = 2495 fxdr_swapcookie3(tl); 2496 else 2497 uiop->uio_offset = 2498 fxdr_cookie3(tl); 2499 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2500 } 2501 tl += 2; 2502 2503 /* 2504 * Since the attributes are before the file handle 2505 * (sigh), we must skip over the attributes and then 2506 * come back and get them. 2507 */ 2508 attrflag = fxdr_unsigned(int, *tl); 2509 if (attrflag) { 2510 nfsm_dissect(fp, struct nfs_fattr *, NFSX_V3FATTR); 2511 memcpy(&fattr, fp, NFSX_V3FATTR); 2512 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2513 doit = fxdr_unsigned(int, *tl); 2514 if (doit) { 2515 nfsm_getfh(fhp, fhsize, 1); 2516 if (NFS_CMPFH(dnp, fhp, fhsize)) { 2517 VREF(vp); 2518 newvp = vp; 2519 np = dnp; 2520 } else { 2521 error = nfs_nget(vp->v_mount, fhp, 2522 fhsize, &np); 2523 if (!error) 2524 newvp = NFSTOV(np); 2525 } 2526 if (!error) { 2527 const char *cp; 2528 2529 nfs_loadattrcache(&newvp, &fattr, 0); 2530 dp->d_type = 2531 IFTODT(VTTOIF(np->n_vattr->va_type)); 2532 ndp->ni_vp = newvp; 2533 cp = cnp->cn_nameptr + cnp->cn_namelen; 2534 cnp->cn_hash = 2535 namei_hash(cnp->cn_nameptr, &cp); 2536 if (cnp->cn_namelen <= NCHNAMLEN) 2537 cache_enter(ndp->ni_dvp, ndp->ni_vp, 2538 cnp); 2539 } 2540 } 2541 } else { 2542 /* Just skip over the file handle */ 2543 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2544 i = fxdr_unsigned(int, *tl); 2545 nfsm_adv(nfsm_rndup(i)); 2546 } 2547 if (newvp != NULLVP) { 2548 if (newvp == vp) 2549 vrele(newvp); 2550 else 2551 vput(newvp); 2552 newvp = NULLVP; 2553 } 2554 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2555 more_dirs = fxdr_unsigned(int, *tl); 2556 } 2557 /* 2558 * If at end of rpc data, get the eof boolean 2559 */ 2560 if (!more_dirs) { 2561 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2562 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2563 } 2564 m_freem(mrep); 2565 } 2566 /* 2567 * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ 2568 * by increasing d_reclen for the last record. 2569 */ 2570 if (blksiz > 0) { 2571 left = NFS_DIRFRAGSIZ - blksiz; 2572 dp->d_reclen += left; 2573 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2574 uiop->uio_iov->iov_base = (caddr_t)uiop->uio_iov->iov_base + 2575 left; 2576 uiop->uio_iov->iov_len -= left; 2577 uiop->uio_resid -= left; 2578 } 2579 2580 /* 2581 * We are now either at the end of the directory or have filled the 2582 * block. 2583 */ 2584 if (bigenough) 2585 dnp->n_direofoffset = uiop->uio_offset; 2586 nfsmout: 2587 if (newvp != NULLVP) { 2588 if(newvp == vp) 2589 vrele(newvp); 2590 else 2591 vput(newvp); 2592 } 2593 return (error); 2594 } 2595 static char hextoasc[] = "0123456789abcdef"; 2596 2597 /* 2598 * Silly rename. To make the NFS filesystem that is stateless look a little 2599 * more like the "ufs" a remove of an active vnode is translated to a rename 2600 * to a funny looking filename that is removed by nfs_inactive on the 2601 * nfsnode. There is the potential for another process on a different client 2602 * to create the same funny name between the nfs_lookitup() fails and the 2603 * nfs_rename() completes, but... 2604 */ 2605 int 2606 nfs_sillyrename(dvp, vp, cnp) 2607 struct vnode *dvp, *vp; 2608 struct componentname *cnp; 2609 { 2610 struct sillyrename *sp; 2611 struct nfsnode *np; 2612 int error; 2613 short pid; 2614 2615 cache_purge(dvp); 2616 np = VTONFS(vp); 2617 #ifndef DIAGNOSTIC 2618 if (vp->v_type == VDIR) 2619 panic("nfs: sillyrename dir"); 2620 #endif 2621 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename), 2622 M_NFSREQ, M_WAITOK); 2623 sp->s_cred = crdup(cnp->cn_cred); 2624 sp->s_dvp = dvp; 2625 VREF(dvp); 2626 2627 /* Fudge together a funny name */ 2628 pid = cnp->cn_proc->p_pid; 2629 memcpy(sp->s_name, ".nfsAxxxx4.4", 13); 2630 sp->s_namlen = 12; 2631 sp->s_name[8] = hextoasc[pid & 0xf]; 2632 sp->s_name[7] = hextoasc[(pid >> 4) & 0xf]; 2633 sp->s_name[6] = hextoasc[(pid >> 8) & 0xf]; 2634 sp->s_name[5] = hextoasc[(pid >> 12) & 0xf]; 2635 2636 /* Try lookitups until we get one that isn't there */ 2637 while (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2638 cnp->cn_proc, (struct nfsnode **)0) == 0) { 2639 sp->s_name[4]++; 2640 if (sp->s_name[4] > 'z') { 2641 error = EINVAL; 2642 goto bad; 2643 } 2644 } 2645 error = nfs_renameit(dvp, cnp, sp); 2646 if (error) 2647 goto bad; 2648 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2649 cnp->cn_proc, &np); 2650 np->n_sillyrename = sp; 2651 return (0); 2652 bad: 2653 vrele(sp->s_dvp); 2654 crfree(sp->s_cred); 2655 free((caddr_t)sp, M_NFSREQ); 2656 return (error); 2657 } 2658 2659 /* 2660 * Look up a file name and optionally either update the file handle or 2661 * allocate an nfsnode, depending on the value of npp. 2662 * npp == NULL --> just do the lookup 2663 * *npp == NULL --> allocate a new nfsnode and make sure attributes are 2664 * handled too 2665 * *npp != NULL --> update the file handle in the vnode 2666 */ 2667 int 2668 nfs_lookitup(dvp, name, len, cred, procp, npp) 2669 struct vnode *dvp; 2670 const char *name; 2671 int len; 2672 struct ucred *cred; 2673 struct proc *procp; 2674 struct nfsnode **npp; 2675 { 2676 u_int32_t *tl; 2677 caddr_t cp; 2678 int32_t t1, t2; 2679 struct vnode *newvp = (struct vnode *)0; 2680 struct nfsnode *np, *dnp = VTONFS(dvp); 2681 caddr_t bpos, dpos, cp2; 2682 int error = 0, fhlen, attrflag; 2683 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2684 nfsfh_t *nfhp; 2685 const int v3 = NFS_ISV3(dvp); 2686 2687 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 2688 nfsm_reqhead(dvp, NFSPROC_LOOKUP, 2689 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 2690 nfsm_fhtom(dvp, v3); 2691 nfsm_strtom(name, len, NFS_MAXNAMLEN); 2692 nfsm_request(dvp, NFSPROC_LOOKUP, procp, cred); 2693 if (npp && !error) { 2694 nfsm_getfh(nfhp, fhlen, v3); 2695 if (*npp) { 2696 np = *npp; 2697 if (np->n_fhsize > NFS_SMALLFH && fhlen <= NFS_SMALLFH) { 2698 free((caddr_t)np->n_fhp, M_NFSBIGFH); 2699 np->n_fhp = &np->n_fh; 2700 } else if (np->n_fhsize <= NFS_SMALLFH && fhlen>NFS_SMALLFH) 2701 np->n_fhp =(nfsfh_t *)malloc(fhlen,M_NFSBIGFH,M_WAITOK); 2702 memcpy((caddr_t)np->n_fhp, (caddr_t)nfhp, fhlen); 2703 np->n_fhsize = fhlen; 2704 newvp = NFSTOV(np); 2705 } else if (NFS_CMPFH(dnp, nfhp, fhlen)) { 2706 VREF(dvp); 2707 newvp = dvp; 2708 } else { 2709 error = nfs_nget(dvp->v_mount, nfhp, fhlen, &np); 2710 if (error) { 2711 m_freem(mrep); 2712 return (error); 2713 } 2714 newvp = NFSTOV(np); 2715 } 2716 if (v3) { 2717 nfsm_postop_attr(newvp, attrflag); 2718 if (!attrflag && *npp == NULL) { 2719 m_freem(mrep); 2720 vput(newvp); 2721 return (ENOENT); 2722 } 2723 } else 2724 nfsm_loadattr(newvp, (struct vattr *)0); 2725 } 2726 nfsm_reqdone; 2727 if (npp && *npp == NULL) { 2728 if (error) { 2729 if (newvp) 2730 vput(newvp); 2731 } else 2732 *npp = np; 2733 } 2734 return (error); 2735 } 2736 2737 /* 2738 * Nfs Version 3 commit rpc 2739 */ 2740 int 2741 nfs_commit(vp, offset, cnt, procp) 2742 struct vnode *vp; 2743 off_t offset; 2744 uint32_t cnt; 2745 struct proc *procp; 2746 { 2747 caddr_t cp; 2748 u_int32_t *tl; 2749 int32_t t1, t2; 2750 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2751 caddr_t bpos, dpos, cp2; 2752 int error = 0, wccflag = NFSV3_WCCRATTR; 2753 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2754 2755 #ifdef fvdl_debug 2756 printf("commit %lu - %lu\n", (unsigned long)offset, 2757 (unsigned long)(offset + cnt)); 2758 #endif 2759 2760 if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0) 2761 return (0); 2762 nfsstats.rpccnt[NFSPROC_COMMIT]++; 2763 nfsm_reqhead(vp, NFSPROC_COMMIT, NFSX_FH(1)); 2764 nfsm_fhtom(vp, 1); 2765 nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2766 txdr_hyper(offset, tl); 2767 tl += 2; 2768 *tl = txdr_unsigned(cnt); 2769 nfsm_request(vp, NFSPROC_COMMIT, procp, VTONFS(vp)->n_wcred); 2770 nfsm_wcc_data(vp, wccflag); 2771 if (!error) { 2772 nfsm_dissect(tl, u_int32_t *, NFSX_V3WRITEVERF); 2773 if (memcmp((caddr_t)nmp->nm_verf, (caddr_t)tl, 2774 NFSX_V3WRITEVERF)) { 2775 memcpy((caddr_t)nmp->nm_verf, (caddr_t)tl, 2776 NFSX_V3WRITEVERF); 2777 error = NFSERR_STALEWRITEVERF; 2778 } 2779 } 2780 nfsm_reqdone; 2781 return (error); 2782 } 2783 2784 /* 2785 * Kludge City.. 2786 * - make nfs_bmap() essentially a no-op that does no translation 2787 * - do nfs_strategy() by doing I/O with nfs_readrpc/nfs_writerpc 2788 * (Maybe I could use the process's page mapping, but I was concerned that 2789 * Kernel Write might not be enabled and also figured copyout() would do 2790 * a lot more work than memcpy() and also it currently happens in the 2791 * context of the swapper process (2). 2792 */ 2793 int 2794 nfs_bmap(v) 2795 void *v; 2796 { 2797 struct vop_bmap_args /* { 2798 struct vnode *a_vp; 2799 daddr_t a_bn; 2800 struct vnode **a_vpp; 2801 daddr_t *a_bnp; 2802 int *a_runp; 2803 } */ *ap = v; 2804 struct vnode *vp = ap->a_vp; 2805 int bshift = vp->v_mount->mnt_fs_bshift - vp->v_mount->mnt_dev_bshift; 2806 2807 if (ap->a_vpp != NULL) 2808 *ap->a_vpp = vp; 2809 if (ap->a_bnp != NULL) 2810 *ap->a_bnp = ap->a_bn << bshift; 2811 if (ap->a_runp != NULL) 2812 *ap->a_runp = 1024 * 1024; /* XXX */ 2813 return (0); 2814 } 2815 2816 /* 2817 * Strategy routine. 2818 * For async requests when nfsiod(s) are running, queue the request by 2819 * calling nfs_asyncio(), otherwise just all nfs_doio() to do the 2820 * request. 2821 */ 2822 int 2823 nfs_strategy(v) 2824 void *v; 2825 { 2826 struct vop_strategy_args *ap = v; 2827 struct buf *bp = ap->a_bp; 2828 struct proc *p; 2829 int error = 0; 2830 2831 if ((bp->b_flags & (B_PHYS|B_ASYNC)) == (B_PHYS|B_ASYNC)) 2832 panic("nfs physio/async"); 2833 if (bp->b_flags & B_ASYNC) 2834 p = NULL; 2835 else 2836 p = curproc; /* XXX */ 2837 2838 /* 2839 * If the op is asynchronous and an i/o daemon is waiting 2840 * queue the request, wake it up and wait for completion 2841 * otherwise just do it ourselves. 2842 */ 2843 2844 if ((bp->b_flags & B_ASYNC) == 0 || 2845 nfs_asyncio(bp)) 2846 error = nfs_doio(bp, p); 2847 return (error); 2848 } 2849 2850 /* 2851 * fsync vnode op. Just call nfs_flush() with commit == 1. 2852 */ 2853 /* ARGSUSED */ 2854 int 2855 nfs_fsync(v) 2856 void *v; 2857 { 2858 struct vop_fsync_args /* { 2859 struct vnodeop_desc *a_desc; 2860 struct vnode * a_vp; 2861 struct ucred * a_cred; 2862 int a_flags; 2863 off_t offlo; 2864 off_t offhi; 2865 struct proc * a_p; 2866 } */ *ap = v; 2867 2868 return (nfs_flush(ap->a_vp, ap->a_cred, 2869 (ap->a_flags & FSYNC_WAIT) != 0 ? MNT_WAIT : 0, ap->a_p, 1)); 2870 } 2871 2872 /* 2873 * Flush all the data associated with a vnode. 2874 */ 2875 int 2876 nfs_flush(vp, cred, waitfor, p, commit) 2877 struct vnode *vp; 2878 struct ucred *cred; 2879 int waitfor; 2880 struct proc *p; 2881 int commit; 2882 { 2883 struct nfsnode *np = VTONFS(vp); 2884 int error; 2885 int flushflags = PGO_ALLPAGES|PGO_CLEANIT|PGO_SYNCIO; 2886 UVMHIST_FUNC("nfs_flush"); UVMHIST_CALLED(ubchist); 2887 2888 simple_lock(&vp->v_interlock); 2889 error = VOP_PUTPAGES(vp, 0, 0, flushflags); 2890 if (np->n_flag & NWRITEERR) { 2891 error = np->n_error; 2892 np->n_flag &= ~NWRITEERR; 2893 } 2894 UVMHIST_LOG(ubchist, "returning %d", error,0,0,0); 2895 return (error); 2896 } 2897 2898 /* 2899 * Return POSIX pathconf information applicable to nfs. 2900 * 2901 * N.B. The NFS V2 protocol doesn't support this RPC. 2902 */ 2903 /* ARGSUSED */ 2904 int 2905 nfs_pathconf(v) 2906 void *v; 2907 { 2908 struct vop_pathconf_args /* { 2909 struct vnode *a_vp; 2910 int a_name; 2911 register_t *a_retval; 2912 } */ *ap = v; 2913 struct nfsv3_pathconf *pcp; 2914 struct vnode *vp = ap->a_vp; 2915 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2916 int32_t t1, t2; 2917 u_int32_t *tl; 2918 caddr_t bpos, dpos, cp, cp2; 2919 int error = 0, attrflag; 2920 #ifndef NFS_V2_ONLY 2921 struct nfsmount *nmp; 2922 unsigned int l; 2923 u_int64_t maxsize; 2924 #endif 2925 const int v3 = NFS_ISV3(vp); 2926 2927 switch (ap->a_name) { 2928 /* Names that can be resolved locally. */ 2929 case _PC_PIPE_BUF: 2930 *ap->a_retval = PIPE_BUF; 2931 break; 2932 case _PC_SYNC_IO: 2933 *ap->a_retval = 1; 2934 break; 2935 /* Names that cannot be resolved locally; do an RPC, if possible. */ 2936 case _PC_LINK_MAX: 2937 case _PC_NAME_MAX: 2938 case _PC_CHOWN_RESTRICTED: 2939 case _PC_NO_TRUNC: 2940 if (!v3) { 2941 error = EINVAL; 2942 break; 2943 } 2944 nfsstats.rpccnt[NFSPROC_PATHCONF]++; 2945 nfsm_reqhead(vp, NFSPROC_PATHCONF, NFSX_FH(1)); 2946 nfsm_fhtom(vp, 1); 2947 nfsm_request(vp, NFSPROC_PATHCONF, 2948 curproc, curproc->p_ucred); /* XXX */ 2949 nfsm_postop_attr(vp, attrflag); 2950 if (!error) { 2951 nfsm_dissect(pcp, struct nfsv3_pathconf *, 2952 NFSX_V3PATHCONF); 2953 switch (ap->a_name) { 2954 case _PC_LINK_MAX: 2955 *ap->a_retval = 2956 fxdr_unsigned(register_t, pcp->pc_linkmax); 2957 break; 2958 case _PC_NAME_MAX: 2959 *ap->a_retval = 2960 fxdr_unsigned(register_t, pcp->pc_namemax); 2961 break; 2962 case _PC_CHOWN_RESTRICTED: 2963 *ap->a_retval = 2964 (pcp->pc_chownrestricted == nfs_true); 2965 break; 2966 case _PC_NO_TRUNC: 2967 *ap->a_retval = 2968 (pcp->pc_notrunc == nfs_true); 2969 break; 2970 } 2971 } 2972 nfsm_reqdone; 2973 break; 2974 case _PC_FILESIZEBITS: 2975 #ifndef NFS_V2_ONLY 2976 if (v3) { 2977 nmp = VFSTONFS(vp->v_mount); 2978 if ((nmp->nm_iflag & NFSMNT_GOTFSINFO) == 0) 2979 if ((error = nfs_fsinfo(nmp, vp, 2980 curproc->p_ucred, curproc)) != 0) /* XXX */ 2981 break; 2982 for (l = 0, maxsize = nmp->nm_maxfilesize; 2983 (maxsize >> l) > 0; l++) 2984 ; 2985 *ap->a_retval = l + 1; 2986 } else 2987 #endif 2988 { 2989 *ap->a_retval = 32; /* NFS V2 limitation */ 2990 } 2991 break; 2992 default: 2993 error = EINVAL; 2994 break; 2995 } 2996 2997 return (error); 2998 } 2999 3000 /* 3001 * NFS advisory byte-level locks. 3002 */ 3003 int 3004 nfs_advlock(v) 3005 void *v; 3006 { 3007 struct vop_advlock_args /* { 3008 struct vnode *a_vp; 3009 caddr_t a_id; 3010 int a_op; 3011 struct flock *a_fl; 3012 int a_flags; 3013 } */ *ap = v; 3014 struct nfsnode *np = VTONFS(ap->a_vp); 3015 3016 return lf_advlock(ap, &np->n_lockf, np->n_size); 3017 } 3018 3019 /* 3020 * Print out the contents of an nfsnode. 3021 */ 3022 int 3023 nfs_print(v) 3024 void *v; 3025 { 3026 struct vop_print_args /* { 3027 struct vnode *a_vp; 3028 } */ *ap = v; 3029 struct vnode *vp = ap->a_vp; 3030 struct nfsnode *np = VTONFS(vp); 3031 3032 printf("tag VT_NFS, fileid %ld fsid 0x%lx", 3033 np->n_vattr->va_fileid, np->n_vattr->va_fsid); 3034 if (vp->v_type == VFIFO) 3035 fifo_printinfo(vp); 3036 printf("\n"); 3037 return (0); 3038 } 3039 3040 /* 3041 * NFS file truncation. 3042 */ 3043 int 3044 nfs_truncate(v) 3045 void *v; 3046 { 3047 #if 0 3048 struct vop_truncate_args /* { 3049 struct vnode *a_vp; 3050 off_t a_length; 3051 int a_flags; 3052 struct ucred *a_cred; 3053 struct proc *a_p; 3054 } */ *ap = v; 3055 #endif 3056 3057 /* Use nfs_setattr */ 3058 return (EOPNOTSUPP); 3059 } 3060 3061 /* 3062 * NFS update. 3063 */ 3064 int 3065 nfs_update(v) 3066 void *v; 3067 #if 0 3068 struct vop_update_args /* { 3069 struct vnode *a_vp; 3070 struct timespec *a_ta; 3071 struct timespec *a_tm; 3072 int a_waitfor; 3073 } */ *ap = v; 3074 #endif 3075 { 3076 3077 /* Use nfs_setattr */ 3078 return (EOPNOTSUPP); 3079 } 3080 3081 /* 3082 * Just call bwrite(). 3083 */ 3084 int 3085 nfs_bwrite(v) 3086 void *v; 3087 { 3088 struct vop_bwrite_args /* { 3089 struct vnode *a_bp; 3090 } */ *ap = v; 3091 3092 return (bwrite(ap->a_bp)); 3093 } 3094 3095 /* 3096 * nfs special file access vnode op. 3097 * Essentially just get vattr and then imitate iaccess() since the device is 3098 * local to the client. 3099 */ 3100 int 3101 nfsspec_access(v) 3102 void *v; 3103 { 3104 struct vop_access_args /* { 3105 struct vnode *a_vp; 3106 int a_mode; 3107 struct ucred *a_cred; 3108 struct proc *a_p; 3109 } */ *ap = v; 3110 struct vattr va; 3111 struct vnode *vp = ap->a_vp; 3112 int error; 3113 3114 error = VOP_GETATTR(vp, &va, ap->a_cred, ap->a_p); 3115 if (error) 3116 return (error); 3117 3118 /* 3119 * Disallow write attempts on filesystems mounted read-only; 3120 * unless the file is a socket, fifo, or a block or character 3121 * device resident on the filesystem. 3122 */ 3123 if ((ap->a_mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3124 switch (vp->v_type) { 3125 case VREG: 3126 case VDIR: 3127 case VLNK: 3128 return (EROFS); 3129 default: 3130 break; 3131 } 3132 } 3133 3134 return (vaccess(va.va_type, va.va_mode, 3135 va.va_uid, va.va_gid, ap->a_mode, ap->a_cred)); 3136 } 3137 3138 /* 3139 * Read wrapper for special devices. 3140 */ 3141 int 3142 nfsspec_read(v) 3143 void *v; 3144 { 3145 struct vop_read_args /* { 3146 struct vnode *a_vp; 3147 struct uio *a_uio; 3148 int a_ioflag; 3149 struct ucred *a_cred; 3150 } */ *ap = v; 3151 struct nfsnode *np = VTONFS(ap->a_vp); 3152 3153 /* 3154 * Set access flag. 3155 */ 3156 np->n_flag |= NACC; 3157 np->n_atim.tv_sec = time.tv_sec; 3158 np->n_atim.tv_nsec = time.tv_usec * 1000; 3159 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_read), ap)); 3160 } 3161 3162 /* 3163 * Write wrapper for special devices. 3164 */ 3165 int 3166 nfsspec_write(v) 3167 void *v; 3168 { 3169 struct vop_write_args /* { 3170 struct vnode *a_vp; 3171 struct uio *a_uio; 3172 int a_ioflag; 3173 struct ucred *a_cred; 3174 } */ *ap = v; 3175 struct nfsnode *np = VTONFS(ap->a_vp); 3176 3177 /* 3178 * Set update flag. 3179 */ 3180 np->n_flag |= NUPD; 3181 np->n_mtim.tv_sec = time.tv_sec; 3182 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3183 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_write), ap)); 3184 } 3185 3186 /* 3187 * Close wrapper for special devices. 3188 * 3189 * Update the times on the nfsnode then do device close. 3190 */ 3191 int 3192 nfsspec_close(v) 3193 void *v; 3194 { 3195 struct vop_close_args /* { 3196 struct vnode *a_vp; 3197 int a_fflag; 3198 struct ucred *a_cred; 3199 struct proc *a_p; 3200 } */ *ap = v; 3201 struct vnode *vp = ap->a_vp; 3202 struct nfsnode *np = VTONFS(vp); 3203 struct vattr vattr; 3204 3205 if (np->n_flag & (NACC | NUPD)) { 3206 np->n_flag |= NCHG; 3207 if (vp->v_usecount == 1 && 3208 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3209 VATTR_NULL(&vattr); 3210 if (np->n_flag & NACC) 3211 vattr.va_atime = np->n_atim; 3212 if (np->n_flag & NUPD) 3213 vattr.va_mtime = np->n_mtim; 3214 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p); 3215 } 3216 } 3217 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_close), ap)); 3218 } 3219 3220 /* 3221 * Read wrapper for fifos. 3222 */ 3223 int 3224 nfsfifo_read(v) 3225 void *v; 3226 { 3227 struct vop_read_args /* { 3228 struct vnode *a_vp; 3229 struct uio *a_uio; 3230 int a_ioflag; 3231 struct ucred *a_cred; 3232 } */ *ap = v; 3233 struct nfsnode *np = VTONFS(ap->a_vp); 3234 3235 /* 3236 * Set access flag. 3237 */ 3238 np->n_flag |= NACC; 3239 np->n_atim.tv_sec = time.tv_sec; 3240 np->n_atim.tv_nsec = time.tv_usec * 1000; 3241 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), ap)); 3242 } 3243 3244 /* 3245 * Write wrapper for fifos. 3246 */ 3247 int 3248 nfsfifo_write(v) 3249 void *v; 3250 { 3251 struct vop_write_args /* { 3252 struct vnode *a_vp; 3253 struct uio *a_uio; 3254 int a_ioflag; 3255 struct ucred *a_cred; 3256 } */ *ap = v; 3257 struct nfsnode *np = VTONFS(ap->a_vp); 3258 3259 /* 3260 * Set update flag. 3261 */ 3262 np->n_flag |= NUPD; 3263 np->n_mtim.tv_sec = time.tv_sec; 3264 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3265 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), ap)); 3266 } 3267 3268 /* 3269 * Close wrapper for fifos. 3270 * 3271 * Update the times on the nfsnode then do fifo close. 3272 */ 3273 int 3274 nfsfifo_close(v) 3275 void *v; 3276 { 3277 struct vop_close_args /* { 3278 struct vnode *a_vp; 3279 int a_fflag; 3280 struct ucred *a_cred; 3281 struct proc *a_p; 3282 } */ *ap = v; 3283 struct vnode *vp = ap->a_vp; 3284 struct nfsnode *np = VTONFS(vp); 3285 struct vattr vattr; 3286 3287 if (np->n_flag & (NACC | NUPD)) { 3288 if (np->n_flag & NACC) { 3289 np->n_atim.tv_sec = time.tv_sec; 3290 np->n_atim.tv_nsec = time.tv_usec * 1000; 3291 } 3292 if (np->n_flag & NUPD) { 3293 np->n_mtim.tv_sec = time.tv_sec; 3294 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3295 } 3296 np->n_flag |= NCHG; 3297 if (vp->v_usecount == 1 && 3298 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3299 VATTR_NULL(&vattr); 3300 if (np->n_flag & NACC) 3301 vattr.va_atime = np->n_atim; 3302 if (np->n_flag & NUPD) 3303 vattr.va_mtime = np->n_mtim; 3304 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p); 3305 } 3306 } 3307 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_close), ap)); 3308 } 3309